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It's getting me crazy!
compiz or unity refresh screen (like I run compiz --replace or unity --replace) by every movement I do (e.g ctrl+tab, super+w) and somehow unexpectedly! sometimes it failed to reload title bar and keyboard functions like ctrl+tab and alt+F2 stop working, and I had no chance but reboot!

Sometimes it work without any problem. I couldn't found any reason why this happen.

I wanted to report a bug but I don't have enough information about it.

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closed as off topic by Marco Ceppi Feb 3 '12 at 0:18

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Sounds to me like compiz is crashing, and it's quite likely a bug or simply that you have incomplete upgrades, or a bad configuration. Did you change any settings in compiz of note? –  RolandiXor Jun 11 '11 at 15:55
    
I changed decorate windows parametere from any to (any) && !(class=covergloobus.py) because it windowed covergloobus (problem start when I changed it). I thought problem is caused by that, but I restart setting and having same problem –  Behzadsh Jun 11 '11 at 16:20
    
Sounds like you broke Unity! I suggest that you try the [troubleshooting tips here][1]. [1]: askubuntu.com/questions/17610/… –  jrg Aug 10 '11 at 14:06
    
This question should instead be filed as a bug report, thanks! Instructions here. –  Jorge Castro Feb 3 '12 at 0:14

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