I would e-mail the minidump to support@ironcladgames.com so they can fix it,
You can get the minidump in E:\Documents and Settings\Your Name Here\Local Settings\Temp\Sins Dump/ and email the file to them. The file path is differnt for Visa though
Sorry if you already knew that, I just thought it might help. I'll try to re-create the bug and get back to you, oh and try setting you graphics to low and disableing bloom and antialiasing, that might help.
Good luck!
Edit: Yeah I tested it and this happened to me too! It was also at an asteriod, but I dunno if that is the common factor.