When a document container is split the source container is left with no tab selected.
- If you open the Tabbed Document sample (2009 Q1).
- Drag "document2" so it breaks the document area into 2 horizontally, and drop it below
- you now have 3 documents tabbed in the top half and "document2" in the bottom half.
- "Document1" is now showing in the top half, its text is bold, however its tab is not highlighted, and as its not properly selected the close button does not work.
This is quite confusing to uses as its not obvious why they can't close the window.