Looks like I have another bug.  I threw in 60 balls into the box (note: 
front panel is invisible) but my physics system couldn't handle the 
pressure.  Sudden burst of (accumulated?) energy are released.  I have a 
few ideas why and I think I can address the problem.  Not permitting 
slippage doesn't help.  I'm also thinking that having to write out all of 
the float values to a text file between frames sure doesn't help data 
precision either (I've increased the output length).  Still the results 
are kind of funny.

Stats for Tim ;-):

Simulation time: 10 seconds
Rendered 2400 frames averaged down to 240 for motion blur...
On an Athlon 1.2Ghz

Time For Parse/Frame:    0 hours  0 minutes   3.9 seconds (3 seconds)
Time For Parse Total:    2 hours 34 minutes  28.0 seconds (9268 seconds)
Time For Trace/Frame:    0 hours  0 minutes   0.5 seconds (0 seconds)
Time For Trace Total:    0 hours 19 minutes   5.0 seconds (1145 seconds)
          Total Time:    2 hours 53 minutes  33.0 seconds (10413 seconds)
-------------------------------------------------------------------------
CPU time used: kernel 2579.92 seconds, user 10753.82 seconds, total 
13333.74 seconds
Render averaged 1.44 PPS over 19200 pixels

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