Quick feedback:  

One VERY pleasant improvement:  The OpenGL preview is no longer
twitchy.  When I switch cameras or move between frames, the picture 
changes immediately and stays firm.  Previously it waited for a mouse 
move or mysteriously flipped back and forth between views.  
(This improvement wasn't listed specifically in the readme for sr2, or 
at least wasn't listed in any way that I could translate!)

Two things that still aren't fixed:

1. Make movie with P4Render still gives flat black images, no pictures.
2. Keygraph is still weird; mouse slides out of focus. 

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