One of the pleasures of using Zend Studio, and often trying out Fedora Linux pre-releases, is that Zend Studio often breaks on upgrading… this was the case with fedora 6, 7 and now with 8-test2 as well.
If you try to start ZDE after upgrading your system to Fedora 8 test2 (or any other recent xorg/libxcb based distribution) you will be greeted by this error:
xcb_xlib.c:50: xcb_xlib_unlock: Assertion `c->xlib.lock’ failed.
The bug that causes this is discussed in these bug reports:
https://bugs.freedesktop.org/show_bug.cgi?id=9336
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6532373
In short the solution is (in your terminal, as root):
# cd /usr/local/Zend/ZendStudio-5.5.0/jre/lib/i386/xawt
# cp libmawt.so libmawt.so.bak && sed -i ’s/XINERAMA/FAKEEXTN/g’ libmawt.so
And your back in buisness! Happy hacking 
10x for the info it also works for me.
I installed ZendStudio-5_5_0.bin in silent mode
and the installation finished successfully.
after that I did your two steps. What after that?
Does Zend Studio 5.5 run on Fedora 8 final for you? I’ve applied the fix you mention (it’s documented in a few places). I can launch Zend Studio, but the screen is filled with blank areas. It’s completely unusual. None of the fixes I’ve found (related to -Dawt.toolkit=sun.awt.motif.MToolkit) have worked for me. I’m curious to know if anyone else has it working.
Tried a few things, this is how I got it to work finally.
followed this tech note
http://www.zend.com/support/knowledgebase.php?kbid=241&view_only=1
Then I
yum install libXp