I encountered an interesting bug using Office rich edit control and I reported same bug to Microsoft at http://lab.msdn.microsoft.com/ProductFeedback/viewFeedback.aspx?FeedbackId=ce3e82d9-b9fc-42ce-b3a1-0b3621ba0379
and interestly look what they said about the same.
"This is a bug in Offices Rich Edit control. Porting over to the Office12 database and to see the funny side of it,One side they accepts that its a buggy one and the other side they says they are not going to fix it.
Looks very funny