@kiilo: solved for me! in compizConfig Settings Manager the preferences for WIndows decorations:
"command" should read: /usr/bin/compiz-decorator -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/740767 Title: gtk-window-decorator crashed with SIGSEGV in gwd_get_decor_frame() -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs