Pasting unformatted text from Word 2010 into linked text boxes overwriting selected text already there give this error dialogue box:

[Error from Xara Xtreme Pro]
Internal program error 4237.k.no.xt
[OK]

Click [OK] and nothing scary happens. Tried again - repeatable. Quit program, blank design, tried again, same thing.

To repeat:
New document
Draw 2 text areas
Copy text from Word such that one area overflows
Link text areas and delete enough text such that it fits in the two boxes
Select text in both boxes and Ctrl+V
Error!

Xara Xtreme Pro 5.1.0.8917 DL