This is a very mysterious problem for two reasons:
1) We mostly only changed javascript in r106, we made very few editor changes.
2) The error message looks incorrect, since it ought to report something like "The entry point 'foo' was not found", whereas there appears to be an empty space in the error message where that ought to be. This suggests it may be related to an OS issue or some kind of OS customisation.
I don't know what to do about this right now; any more information at all would be helpful, such as testing on a range of computers to see if there's anything in common between the computers it doesn't work on, checking the Windows Event Log like
blackhornet suggested, or trying to find any OS settings that affect it.