Also the same problem here, the crashes are random with rendering or batch, sometimes it works and sometimes with the same file and settings (plugins) it doesn’t, the crash happens around 99% - 100% of the process…
mac pro 2.1 - 8x 3ghz - snow leopard 10.6.8 - 10gb ram - ati 5770 - uad2 solo - ssl duende - MR816csx - dell 30"