AMD/ATI fglrx driver: Window content stops updating (all windows) when using Expo or Desktop Cube

MC Return, could you please provide screenshots and/or video of the problem?

Sure, but I just found out that the problem is related to the mipmap settings and I could fix the Expo plugin behaviour by disabling mipmapping in the plugin.

Here another report about this bug containng the reason for it and a workaround as well:
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/913521

*containing

I want to note here that the Expo plugin was working flawless with mipmapping enabled on a machine with Intel HD4500 on-board gfx and open-source driver, so the mipmapping problem just occurs with fglrx...

I could fix the desktop cube by disabling mipmapping in the "Desktop Cube" options as well, so the bug report should probably be renamed to:

"Mipmapping breaks window content updating when using fglrx"

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 913521, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.