Ok, Thanks. When you check it out again, let me know if this happens after a test game that appears you can do nothing in, and it resumes last session. I was doing a test with about 15 spawning characters, debug mode on, and the Assassin (1) character looked at me and it sent me back to the editor.
Then I restarted everything and set some more new maps and it was working. Tough one to get a reproduce on.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit