I disabled the notification that all robots have died because sometimes you want to run simulations with just vegs. Usually if you're serious about a simulation you have autorestart on anyway. That was the thinking anyway.
Zelos, sounds exactly like you have your max veg population too high. Anything above 2000 or something (I forget, I upped it for 2.36.4) will cause an overflow, or invalid form entry, or something like that.