Version: (using Devel) OS: Linux Installed from: Compiled sources If I increase the height of the panel to some extreme value (like almost half the screen) the plasma desktop is destroyed and replaced with an empty grey box. No widgets or any mouse action is possible inside this dead zone. However, if I then reduce the height the dead zone shrinks a little (but not completely). Work around: logout and then back in. Screenshot: http://bayimg.com/JamchaABh
The bug remains there exactly as before. Using KDE4daily revision: KDETRUNKr898979 at Fri Dec 19 17:52:19 UTC 2008 Composite disabled (obviously, using virtualbox) All defaults ( did a rm -rf .kde/ after update, read somewhere it might help... but didn't change the behavior of the bug ) Later I'll see if it also appears with the Kubuntu beta 2 packages.
Yep, same problem with Kubuntu beta2 packages (nvidia card, composite enabled). The bug remains there. Also noticed that if the increase in height is done in small steps it takes a larger height for it to destroy the plasma background. So the best way to cause this is just to push the height quickly to almost half the screen...
I just noticed this bug doesn't happen if you have two panels (one in the bottom and the other on top). Therefore, if you intend to reproduce it make sure you just have the one bottom panel (like in the default, after the first login).
*** This bug has been marked as a duplicate of bug 176280 ***