[Qt-creator] Keyboard actions are delayed

[Erwin Brandenberger]

I'm working with qtcreator with version 2.0.1 since a long while and was
quite happy with the program.

Now with the Ubuntu 11.04 update the newer version of qtcreator 2.1.
It's 64bit Ubuntu.

After each keyboard stroke it takes nearly one second until the action
is taken. What's the reason ?

On another computer (32bit Ubuntu 11.04) it works fine.