When using paraView/Foam of version 2.4 for a few days on Fedora 8, I found that I cannot edit any text or string appeared in the text edit box.
Here is a solution:
edit the .scim/config
file in your home direcitory, find the line
/FrontEnd/X11/Dynamic = false
change it to
/FrontEnd/X11/Dynamic = true
Then log out of the system and relog in. It will work well. If not please restart your system.
References
1. . Dead Keyboard in paraFoam. Apr 12, 2008