Critical source fixes for XFree86 4.3.0 is now available at ftp://ftp.xfree86.org/pub/XFree86/4.3.0/fixes You can find the changes in ftp://ftp.xfree86.org/pub/XFree86/4.3.0/fixes/changelog-4.3.0.1.txt
QNX6 binaries can be found at the usual place: http://sf.net/projects/openqnx QNX 6.2.1 X Window (non XPhoton) users must upgrade because of the mmap incompatibility introduced between QNX 6.2.0 and 6.2.1.