Version: (using KDE 4.3.2) Installed from: Ubuntu Packages If you have desktop effects activated, then deactivate them for some reason, and finally you activate the effects again, the plasma desktop theme remains opaque as when the desktop effects were deactivated. Everything els works as expected, window shadows, fade animations, so it doesn't seem to be a kwin issue. I have tried several themes and happens every time. Also, there is no difference between activating/deactivating using the System Settings module or the access keys. Thanks in advance.
This is related to bug 186925 and bug 179042. Thanks *** This bug has been marked as a duplicate of bug 186925 ***