I had this same issue with 2.61, but not with 2.60a.
my scene file is large…about 46 MB, and contains some proprietary contents, and the bug-killer people won’t help me without the file.
I am trying to narrow down the cause,and may have found it: turning off ray tracing allows the render of animation without quitting.
Does this provide enough clue about what’s up…what the cause of the problem is?
IF I render animation in the very same file in 2.60a, Blender does not quit.
thank you for any thoughts or suggestions.