There is a system independant drawing bug (occurs on linux and on solaris) which can be reproduced as follows:
- Start Excel
- Fill up a few fields with data
- Mark a few fields and press ctrl-c (copy)
- Put the cursor on another field and press ctrl-v (paste)
- Put the cursor elsewhere, paste again
At every paste a rectangular frame is left on the screen. They disappear when excel is minimized and maximized again, so it's a bug, not a feature.
This bug has been in rdesktop since I know it exists, so for quite a while...