rea...@gentoo ~ $ ldd /usr/lib64/NX/bin/* | grep "not found" libXcomp.so.3 => not found libXcompext.so.3 => not found libXcompshad.so.3 => not found libXcomp.so.3 => not found
So today's update of glibc seems to have broken those binaries. However, running revdep-rebuilt doesn't find the breakage:
"* Dynamic linking on your system is consistent... All done."