Since the last big software update on June 16th several libraries and programs have been updated.

MPT (MPI) 3.0.2
pgi 7.2.3
pathscale 3.2
CrayPat 4.3.1
libfast 1.0 (new library with some optimized math functions)
fftw 2.1.5.1
PAPI 3.6
Totalview 8.4.1b
gcc 4.2.4 (only for login-node programs)
xt-asyncpe 1.0c (new compiler wrappers)
xt-binutils-quadcore 2.0.1 (binutils for AMD quadcore)
Moab 5.2.3 scheduler (remember to log out and in again)

Users will need to log out and in again to get the above as default modules.
Because all applications that run on the compute nodes are statically compiled, we encourage re-compiling of applications and libraries, especially if you have experienced problems.