I have released another nx-libs version which hopefully fixes the nx-libs (and related) upgrade problems.
Packages are currently building. It will take a few hours until the builds are through, though.
Even after that, x2goserver will still be broken. I will need to build perl-Try-Tiny for EPEL6 and put it up our extras repository. Sadly I ran out of time right now and can only continue later tonight (UTC-ish time zone.)
Mihai