All, I was wondering if anyone else has had this problem.
System:
OpenSuSE 11.3
KDE 4.4.4
Compiz 0.8.6-41.1

Problem: When I right click on the desktop of KDE, I select the option to "Add Widget", the widget bar appears behind my taskbar. If I right click on the taskbar and select the same option, it appears directly above the taskbar.

On the taskbar (system tray widget), lets say Amarok is running (little icon in the system tray), if I right click on it, half the menu appears behind the taskbar, this happens for all icons in the system tray widget.

If I use the "KDE Desktop effects", these problems do not occur. I use compiz though, more options, more flexible. I tried deleting my .KDE4 directory, then restarting X, fresh desktop and all, soon as I enable compiz and try again, same problems.

Got frustrated, created a new user, activated compiz, NO PROBLEMS. So it is not compiz, I think there might be a setting I am overlooking to delete?

Of course, I have thought about deleting my user completely and then having another go at it as a "new" user. This is a last resort though, as I do not want to have to transfer all my downloads, documents, and so on... (being lazy).

So, if anyone has any ideas, this would be appreciated. Oh, and I did do a search for plasma, taskbar, widget bar, combinations of those, found "other" problems, but it seems that I may have found a unique one to myself.

Greetingz!

Suggestion:
1) logout of X (the fancy GUI desktop).
2) login via the command-line.
3) Make a directory called "old" in your home directory, and put everything in there.

cd ~
mkdir old
mv * old
mv .??* old

4) Log back into X (the fancy GUI). Don't do anything except logout.
5) Log back in via the command-line. Copy one "dot file" or "dot directory" out of "old" and into your home directory.
6) login to the GUI, is it broken yet? If not, repeat until you break it, then you know what file or directory broke your user environment.

Good luck! Let us know what it was!

P.S: I realize this may sound teadious, but in the 1.5 decades I've been working with UNIX, I have only one rule;
"The users manage their own user environment" (and this type of thing is exactly why).

Tedious yes. It sounds like you want me to be Sherlock Holmes. Eliminate all the impossible, whatever is left, no matter how improbable, has to be the answer.

@Watson
Well, I'm assuming you've checked both your syslog logs (probably /var/log/messages) and your X server logs (maybe /var/log/Xorg.0.log). So if that hasn't helped, you could always just create a new account, then move your data (downloads and such) into it.
Certain things like your shell environment files (.bash*, .profile, .kshrc, and so forth) and application-specific things (like .mozilla), should be safe to move too.

The upside to the Sherlock Holmes method is that you should be able to narrow down exactly what's causing the problem, and thus avoid repeating it in the future.