I'll be compiling a complete new set of binaries sometime this week - today or tomorrow, probably. This will have a new release number.
I wasn't aware anyone was using the IRIX binaries, but then I don't look at the download logs much. If you have a multi-CPU machine, you may want to checkout the new "-jobs" option to 3dDeconvolve. It parallelizes the computations across multiple processes, which can speed things up a lot.