1.2.5 (April,2012)
In this release, we fixed most of the bugs found in POI 3.8 beta 4. 

POI Bug Fixes
51535 - correct signed vs unsigned short reading in NDocumentInputStream(poi-developers)
50209 - Fixed evaluation of Subtotals to ignore nested subtotals(poi-developers)
50401 - fixed EscherProperty to return property name instead of 'unknown' for complex properties (poi-developers)
51481 - Fixed autofilters in HSSF to avoid warnings in Excel 2007(poi-developers)
51533 - Avoid exception when changing name of a sheet containing shared formulas(poi-developers)
46250 - Fixed cloning worksheets with images(poi-developers)
51514 - allow HSSFObjectData to work with both POIFS and NPOIFS(poi-developers)
51514 - avoid NPE when copying nodes from one HSSF workbook to a new one, when opened from NPOIFS(poi-developers)
51504 - avoid NPE when DefaultRowHeight or DefaultColumnWidth records are missing(poi-developers)
48294 - Fixed HSSFWorkbook.setSheetOrder() to respect inter-sheet references (poi-developers)
51448 - Avoid exception when evaluating workbooks with more than 256 sheets (poi-developers)
51458 - Correct BitField wrapping when setting large values(poi-developers)
51415 - Fixed Workbook.createSheet(sheetName) to truncate names longer than 31 characters(poi-developers)
51332 - Fixed internal IDs of shapes generated by HSSFPatriarch when there are more than 1023 drawing objects (poi-developers)
50681 - Avoid exceptions in HSSFDataFormat.getDataFormatString() (poi-developers)
50681 - Fixed autosizing columns beyond 255 character limit (poi-developers)
51339 - Fixed arithmetic rounding in formula evaluation (poi-developers)
51098 - Correctly calculate image width/height, if image fits into one cell(poi-developers)
51153 - Correct sizing of LbsDataSubRecord with unused padding fields(poi-developers)
51143 - NameCommentRecord correction for writing non ASCII strings(poi-developers)
51100 - Fix IOUtils issue for NPOIFS reading from an InputStream where every block is full(poi-developers)
50841 - Improved SpreadSheet DataFormatter to handle scientific notation, invalid dates and format spacers(poi-developers)
50939 - ChartEndObjectRecord is supposed to have 6 bytes at the end, but handle it not(poi-developers)
50912 - fixed setting named styles to HSSFCells(poi-developers)
50779 - fixed RecordFormatException when reading unicode strings with photenic data(poi-developers)
50718 - More helpful error message when you try to create a CellReference with #REF!(poi-developers)
50786 - Speed up calls to HSSFColor.getIndexHash() by returning a cached, unmodifiable Map. HSSFColor.getModifiableIndexHash() provides access to the old (slow but modifiable) functionality(poi-developers)
32903 - Correct XBAT chaining explanation in /poifs/fileformat.html(poi-developers)
46664 - When creating HSSF Print Areas, ensure the named range is reference based not value based(poi-developers)
50756 - When formatting numbers based on their Cell Style, treat GENERAL the same as the more typical General(poi-developers)
fixed HSSFWorkbook.createCellStyle to throw exception if the maximum number of cell styles was exceeded(poi-developers)
49928 - allow overridden built-in formats in HSSFCellStyle(poi-developers)
50587 - Improved documentation on user-defined functions(poi-developers)
50416 - Correct shifting of the first or last row in a sheet by multiple rows(POI-DEVELOPERS)
50246 - Properly position GutsRecord when reading HSSF workbooks(POI-DEVELOPERS)
50437 - Support passing ranges to NPV()(POI-DEVELOPERS)
47405 - Improved performance of RowRecordsAggregate.getStartRowNumberForBlock / getEndRowNumberForBlock(poi-developers)
50113 - Remove cell from Calculation Chain after setting cell type to blank (poi-developers)
50096 - Fixed evaluation of cell references with column index greater than 255 (poi-developers)
49761 - Tolerate Double.NaN when reading .xls files(poi-developers)
50211 - Use cached formula result when auto-sizing formula cells(poi-developers)
50118 - OLE2 does allow a directory with an empty name, so support this in POIFS(poi-developers)

NPOI Bug fixes
a. CloneSheet with images throws exception
b. Comments are still visible even set Visible property to false
c. AutoSizeColumn doesn't work as expected
d. Reading sheet protected workbook throws exception

New Features
a. Added NPOIFS constructors to most POIDocument classes and their extractors, and more widely deprecated the Document(DirectoryNode, POIFSFileSystem) constructor in      favour of the more general Document(DirectoryNode) one
b. Added implementation for CLEAN(), CHAR(), ADDRESS(),MROUND(), VAR(), VARP(), IRR()
c. Added Support for HOUR, MINUTE and SECOND date formulas
d. Support for continued NameRecords, continued ExtSSTRecords
e. Support using RecalcIdRecord to trigger a full formula recalculation on load (poi-developers)
f. ExternalNameRecord support for DDE Link entries without an operation(poi-developers)
g. POIFS Browser: add ability to parse EscherContainer and sub nodes

1.2.4 (Nov,2011)
In this release, we fixed most of the bugs found in POI 3.6 and POI 3.7. 

NPOI Bug Fixes
5157 - HSSFSheet.FitToPage property is added. It doesn't work previously.
7271 - Cell formula that has been "dragged" down cannot be read. Patch is applied
xxx - Bad padding calculation 
3804 - NPOI doesn't work with a Excel template with macro 

POI Bug Fixes
46547 - ClassCastException in HSSFSheet.shiftRows(...)
47363 - Fixed HSSFSheet to allow addition of data validations after sheet protection
45066 - sheet encoding size mismatch problems
49026 - added implementation for text() (poi-developers)
46654 - HSSFRow/RowRecord to properly update cell boundary indexes(POI-DEVELOPERS)
46385 - (also patch 46362) fix serialization of StyleRecord with unicode name(POI-DEVELOPERS)
47069 - Fixed HSSFSheet#getFirstRowNum and HSSFSheet#getLastRowNum to return correct values after removal of all rows(POI-DEVELOPERS)
48325 - bad text 'Page &P of &N' and similar errors when reading in spreadsheets
48485 - add extra paper size constans to printsetup, such as a3, b4 and b5(poi-developers)
48425 - improved performance of dateutil.iscelldateformatted() (poi-developers)
49524 - add vertical text orientation method
47001 - Fixed WriteAccessRecord and LinkTable to handle unusual format written by Google Docs(POI-DEVELOPERS)
46368 - Fix HSSFRichTextRun and strings longer than 32768 characters(POI-DEVELOPERS)
48292 - Support of array formulas
49820 - ParagraphProperties.getLvl() returns 0 for both Level 1 and Body text
      - fixed HSSFWorkbook.createCellStyle to throw exception if the maximum number of cell styles was exceeded(poi-developers)
47405 - Improved performance of RowRecordsAggregate.getStartRowNumberForBlock / getEndRowNumberForBlock(poi-developers)
46250 - Workbook cloneSheet() - clone images
48026 - duplicate footer and header
46664 - Print Area does not save in HSSF worksheets
49761 - Double.NaN can be written but not read with POI
47309 - Number of Cell Comments in a sheet limited to 65536 with HSSF 
46776 - POI does not work when run the method "cloneSheet()" 
47250 - Fixed FontRecord to expect unicode flags even when name length is zero(POI-DEVELOPERS)
47198 - Fixed formula evaluator comparison of -0.0 and 0.0(POI-DEVELOPERS)
46287 - Control of header and footer extraction in ExcelExtractor / XSSFExcelExtractor(POI-DEVELOPERS)
47154 - Handle the cell format @ as the same as General(POI-DEVELOPERS)
40520 - Fixed HSSFFont.applyFont() to properly apply font to overlapping regions(POI-DEVELOPERS)
45720 - cloneSheet breaks autofilters 
46643 - Formula parser should encode explicit range operator with tMemFunc 
51481 - Office 2007 warning if using autofilter 
50681 - autoSizeColumn sets column width beyond 255 character limit for XSSF sheets and HSSF Sheets
50912 - Applying an HSSFCellStyle on an HSSFCell has no effect
51143 - NameCommentRecord correction for writing non ASCII strings(poi-developers)

New Features
a. Add NameCommentRecord, HeaderFooterRecord
b. AutoFilter Phrase II - it's able to create autofilter with any cell range
c. Add the method to determine if the cell is merged or not
d. Support compilation with MonoDeveloper
e. Change all interface name starting with 'I'

1.2.3 (Nov. 2010)
NPOI Bug fixes
5010 - Unable to read xls file with pivot table 
5139 - SheetExtRecord DataSize is 40 
6177 - LeftoverDataException: Intermitend Bug 
6341 - System.NullReferenceException on Workbook.Dispose (+Bugfix) 
Change NPOI.HSSF.Model.Sheet to NPOI.HSSF.Model.InternalSheet
Change NPOI.HSSF.Model.Workbook to NPOI.HSSF.Model.InternalWorkbook
6984 - Cannot manually edit/add dates in the xls created by NPOI

Sync POI bug fixes
46776 - Added clone() method to MulBlankRecord to fix crash in Sheet.cloneSheet()(POI-DEVELOPERS)
46547 - Allow addition of conditional formatting after data validation(POI-DEVELOPERS)
45290 - Support odd files where the POIFS header block comes after the data blocks, and is on the data blocks list(POI-DEVELOPERS)
46904 - Fix POIFS issue with duplicate block 0 references on very old BIFF5/BIFF7 files(POI-DEVELOPERS)
45376
47970 - added a method to set arabic mode in HSSFSheet(POI-DEVELOPERS)
47048 - Fixed evaluation of defined names with the 'complex' flag set(POI-DEVELOPERS)
44916 - Allow access to the HSSFPatriarch from HSSFSheet once created(POI-DEVELOPERS)
45672 - improve handling by MissingRecordAwareHSSFListener of records that cover multiple cells (MulBlankRecord and MulRKRecord)(POI-DEVELOPERS)
45698 - Fix LinkTable to tolerate multiple EXTERNSHEET records(POI-DEVELOPERS)
45784 - More fixes to SeriesTextRecord(POI-DEVELOPERS) 
46065 - added implementation for VALUE function(POI-DEVELOPERS) 
45966 - added implementation for FIND function(POI-DEVELOPERS) 
45784 - More fixes to SeriesTextRecord(POI-DEVELOPERS) 
46065 - added implementation for VALUE function(POI-DEVELOPERS) 
45966 - added implementation for FIND function(POI-DEVELOPERS) 
47721 - Added implementation for INDIRECT()
	Added implementation for ISNA()(
48332 - fixed ColumnInfoRecord to tolerate missing reserved field
45778 - fixed ObjRecord to read ftLbsData properly(POI-DEVELOPERS) 
46206 - Fixed Sheet to tolerate missing DIMENSION records(POI-DEVELOPERS) 
47384 - Fixed ExternalNameRecord to handle unicode names(POI-DEVELOPERS) 
47479 - Fix BoolErrRecord to tolerate incorrect format written by OOO
46199 - More tweaks to EmbeddedObjectRefSubRecord(POI-DEVELOPERS) 
47751 - Do not allow HSSF's cell text longer than 32,767 characters
46213 - Fixed FormulaRecordAggregate to gracefully ignore extra StringRecords(POI-DEVELOPERS) 
46301 - added pivot table records: SXDI, SXVDEX, SXPI, SXIDSTM, SXVIEW, SXVD, SXVS, et al(POI-DEVELOPERS) 
48180 - be more forgiving of short chart records, which skip some unused fields(POI-DEVELOPERS) 
46280 - Fixed RowRecordsAggregate etc to properly skip PivotTable records(POI-DEVELOPERS) 
46174 - Fixed HSSFName to handle general formulas (not just area references)(POI-DEVELOPERS) 
47768 - Implementation of Excel "Npv" functions
47771 - Added method setFunction(boolean) for defined names
47770 - built-in positive formats don't need starting '
47737 - adjust sheet indices of named ranges when deleting sheets
47448 - Allow HSSFEventFactory to handle non-zero padding at the end of the workbook stream
47143 - Fixed OOM in HSSFWorkbook#getAllPictures when reading .xls files containing metafiles
47415 - Fixed PageSettingsBlock to allow multiple PLS records
46269 - Improved error message when attempting to read BIFF2 file(POI-DEVELOPERS) 
46189 - added chart records: CHARTFRTINFO, STARTBLOCK, ENDBLOCK, STARTOBJECT, ENDOBJECT, and CATLAB(POI-DEVELOPERS) 
45290 - Support odd files where the POIFS header block comes after the data blocks, and is on the data blocks list(POI-DEVELOPERS) 
46137 - Handle odd files with a ContinueRecord after EOFRecord(POI-DEVELOPERS) 

NPOI 1.2.2 (2009-12-5)
a. ability to identify more Chart record
b. ColumnAutoSize bug is fixed (bug 3754 )
c. DefaultRowHeight bug is fixed (bug 3880)
e. Sheet Tab Formatting (bug 3772)
f. ShrinkToFit property is exposed to user (bug 4103)
g. Active selection area (bug 4527)
h. HSSFSheet.RemoveRow will remove CellRecord as well as RowRecord (bug 3493)
i. Auto filter feature (alpha)
j. read xls template with macro (bug 3804)

NPOI 1.2.1 (2009-6-1)
a. Conditional Formating doesn't work as expected
b. HSSFDataFormat.GetFormat return different index for the same format string
c. Incorrect namespace spelling of NPOI.SS.Formula
d. HSSFCell.ToString() method supports DataFormat now
e. add strong name for all the assembiles
f. HSSFColor.index static variable isn't accessible in VB.NET due to the HSSFColor Index property

NPOI 1.2 (2009-5)
implement features in POI 3.2 final