Thank you for the reply. Your steps seem accurate. The only difference is that we're reading/writing the HTML to/from a SharePoint list. Each time that we read/write from the list, the control creates another set of styles that is unique from the previous version. At one point, we had a single field that was 10mb in size with 9.9mb being style declaration. The fix for us has been to modify the HtmlDataProvider settings. I added the following and fields that were previously 10mb, are now 2k:
<telerik:HtmlImportSettings UseDefaultStylesheetForFontProperties="True" />
<telerik:HtmlExportSettings StyleRepositoryExportMode="DontExportStyles" StylesExportMode="Inline" />
Since there is a workaround, we've resolved our production issue, but it would be nice to know what the root cause was. The only other piece of information is that we recently upgraded from the Silverlight 4 Telerik controls to the Silverlight 5 version.
Thanks in advance for your time!