[plt-scheme] 370.6 segmentation fault

I don't know if this is at all helpful, but I updated from 360-something 
to 370.1 (svn rev 7117) today, and after building it, started getting a 
very similar error on DrScheme startup.

However, in my case the error is intermittent, and I haven't been able 
to figure out how to trigger it reliably.  When it occurs, it occurs 
after the bar in the startup window is filled, but before any icons 
appear, and prints as follows:

   Seg fault (internal error) at (nil)
   Aborted

I have had this occur in the 3m version, both with JIT enabled and 
disabled.  I haven't yet had the problem occur with the CGC version, but 
I'm not sure if that's just coincidence, since I've only tried loading 
the CGC version a few times.  I'm running on Debian AMD64.

Anton