[Xcb] xcb_xlib.c:50: xcb_xlib_unlock: Assertion `c->xlib.lock' failed

[noidee]

After i have update from X11R6.9 to X11R7.1 and some applications crash  ( matlab , cedega and others) 
MATLAB: xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed.

or
python: xcb_xlib.c:50: xcb_xlib_unlock: Assertion `c->xlib.lock' failed.
/usr/bin/cedega: line 51: 30495 Aborted                 ${P2PPATH}/bin/python ${P2PPATH}/Point2Play_gui.py "$@"

Is there anyone who know why ?

I have Slackware 11.0 xorg 7.1 ( build from git ), mesa 6.5.1, cedega 5.1, matlab 7 


 
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