OS? Exact version? Recently updated?
I have it running on Windows XP, Linux, and OS X; no heroics to get it working.
When I just now installed it on this Linux box I noticed it listed a lot more dependencies to install than I'm used to seeing... Unfortunately I had forgotten about this
thread, so I didn't pay attention to them, so I don't know if it could be related. But it worked immediately after a single restart.