Hi Georg,
Unfortunately, Fedora 11 no longer receives updates. Try removing libfreetype* from bin/lib. There may be other libraries that also require glibc 2.11 in bin/lib; in such case remove them too. PI itself should not have a direct dependency to glibc 2.11.
Let me know if this works. Another option would be putting glibc system libraries on bin/lib (for example from Fedora 12/13).