I sometimes get  an "Unknown Error" window with "Cancel" and "OK" Button which sometimes does not work and I have to re-boot.

I'm running

I.B.M Thinkpad T42P + 2GB Ram with Windows XP Corporate Edition.

One Error that is guaranteed to come up is if I  Insert a Replicator and than drag and drop a group of objects into the Replicator and than switch to the Render window to render and It crashes.

I can save the file, re-boot / re-load and render and it will be fine after that.

I'm just starting to live with the crashes and continue but they can be annoying.