Viewer locks up when saving files on Ubuntu Linux 12.04
The Firestorm team was able to resolve the issue by moving from colladadom-2.2-linux-20110621 for libcolladadom to colladadom-2.2-linux-20120702 (see: http://hg.phoenixviewer.com/phoenix-firestorm-lgpl/rev/6e7d29c0323e)
I can confirm that swapping out the libcolladadom binary with the one from Firestorm alleviates the issue on Exodus.
Ubuntu Linux 12.04 (64-bit)
This should be resolved in the upcoming update.