Compiz bug - ubuntu

There is a bug in compiz that causes crash if you click the application that has multiple windows open. The error message normally is:

“Sorry Ubuntu * has experienced an internal error” /usr/bin/compiz

It's fix is simple. Install compize configuration settings and than follow these steps.

1. open ccsm (from terminal)
2. Go to Preferences
3. Go to Plugin list
4. Disable "Automatic Plugin Sorting"
5. Select scale in the right list
6. Click on "<" button
7. Enable"Automatic Pluging Sorting"
8. Reopen ccsm and enable scale
9. Make sure that scale is not the last in the list

[Source] https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1497163