Comment 77 for bug 86103

All mentioned ways to fix the problem excludes Opera browser:

Locking assertion failure. Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb6b6e767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_unlock+0x31) [0xb6b6e8b1]
#2 /usr/lib/libX11.so.6(_XReply+0xfd) [0xb72ce29d]
#3 /usr/lib/j2se/1.4/jre/lib/i386/libawt.so(XineramaIsActive+0xa5) [0xb7c6f7d5]
#4 /usr/lib/libqt-mt.so.3(_ZN14QDesktopWidget11resizeEventEP12QResizeEvent+0x20) [0xb75e91da]
#5 /usr/lib/libqt-mt.so.3(_ZN7QWidget5eventEP6QEvent+0x52b) [0xb76e72a3]
#6 /usr/lib/libqt-mt.so.3(_ZN12QApplication14internalNotifyEP7QObjectP6QEvent+0x274) [0xb7644c36]
#7 /usr/lib/libqt-mt.so.3(_ZN12QApplication6notifyEP7QObjectP6QEvent+0xce8) [0xb7647564]
#8 /usr/lib/libqt-mt.so.3(_ZN12QApplication9sendEventEP7QObjectP6QEvent+0x5b) [0xb75d5279]
#9 /usr/lib/libqt-mt.so.3(_ZN12QApplication16sendPostedEventsEP7QObjecti+0x25c) [0xb7645c6e]
#10 /usr/lib/libqt-mt.so.3(_ZN14QDesktopWidgetC1Ev+0x87) [0xb75e8e61]
#11 /usr/lib/libqt-mt.so.3(_ZN12QApplication7desktopEv+0x5e) [0xb7644e42]
#12 /usr/lib/libqt-mt.so.3(_ZN12QApplication9constructERiPPcNS_4TypeE+0xcc) [0xb764c296]
#13 /usr/lib/libqt-mt.so.3(_ZN12QApplicationC2ERiPPc+0x6a) [0xb764c670]
#14 /usr/lib/opera/9.25-20071214.6/opera [0x8648079]
#15 /usr/lib/opera/9.25-20071214.6/opera [0x8060cb2]
#16 /usr/lib/opera/9.25-20071214.6/opera(_ZN7QWidget6createEmbb+0x554) [0x805ec94]
#17 /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe0) [0xb70b9450]
#18 /usr/lib/opera/9.25-20071214.6/opera(_ZNK7QDialog15minimumSizeHintEv+0x111) [0x805eb71]
opera: xcb_xlib.c:82: xcb_xlib_unlock: Assertion `c->xlib.lock' failed.
Aborted (core dumped)