Version:            (using KDE KDE 3.2.1)
Installed from:    Compiled From Sources
Compiler:          gcc 3.1.3 
OS:          Linux

Sometimes, with probability 30% - 60%, after closing a Konsole window (or some other app's) kwin falls into a loop and together with kded and X raises CPU load to more than 2. This loop cannot be broken other way than restarting X server and KDE. Just closing a session in Konsole also results in the same behaviour. This is not the X bug, because it doesn't occur in other window managers. Note that opening windows, and "normal work" with apps is also ok.

The problem exists both in KDE 3.2.0 and 3.2.1, regardless if it was compiled from source or installed from a  binary package (Slackware). 

To reproduce:
1. open Konsole, run top
2. open another Konsole
3. close "another Konsole"
4. wait a few seconds
5. if you don't see something like that
  
   1040 root      16 -10 68868  18m 3244 R  30.5  1.9   6:54.36 X
 7334 pkolaczk  15   0 13672  13m  11m R  22.2  1.3   2:34.12 kdeinit
24950 pkolaczk   9   0 13948  13m  11m R  47.0  1.4   0:00.33 kdeinit
...

then jump to point 2.