[seahumad@sahumada ~]$ ./Downloads/beta2/qt-linux-opensource-5.0.0-beta2-x86_64-ubuntu1110-offline-2012-11-01.run 
Failed to load platform plugin "xcb". Available platforms are: 
linuxfb
minimal
xcb

[seahumad@sahumada platforms]$ pwd
/home/seahumad/Qt5.0.0beta2/Tools/Qt Creator/bin/platforms
[seahumad@sahumada platforms]$ ldd libxcb.so 
        linux-vdso.so.1 =>  (0x00007fff4f3ff000)
        libX11-xcb.so.1 => /usr/lib64/libX11-xcb.so.1 (0x00007f252ca6f000)
        libXi.so.6 => /usr/lib64/libXi.so.6 (0x00007f252c85e000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007f252c65a000)
        libxcb-glx.so.0 => /usr/lib64/libxcb-glx.so.0 (0x00007f252c446000)
        libxcb-image.so.0 => /usr/lib64/libxcb-image.so.0 (0x00007f252c241000)
        libxcb-shm.so.0 => /usr/lib64/libxcb-shm.so.0 (0x00007f252c03f000)
        libxcb-keysyms.so.1 => /usr/lib64/libxcb-keysyms.so.1 (0x00007f252be3d000)
        libxcb-icccm.so.4 => not found

[seahumad@sahumada platforms]$ locate libxcb-icccm.so
/usr/lib/debug/usr/lib64/libxcb-icccm.so.1.0.0.debug
/usr/lib/debug/usr/lib64/libxcb-icccm.so.1.debug
/usr/lib/debug/usr/lib64/libxcb-icccm.so.debug
/usr/lib64/libxcb-icccm.so
/usr/lib64/libxcb-icccm.so.1
/usr/lib64/libxcb-icccm.so.1.0.0