Simplified and started from a clean slate, without much of
the hidden existing space data that was hanging around
in the old one.
One issue I found is that saving the startup file from
Blender 2.5 also saves the window size and location.
This means the version I just saved would open up
strangely on other screen sizes/setups. I added code to
reset this to default when loading it up from the version
compiled into the Blender binary, but perhaps Ton/
Brecht might want to check the diff.
b36eb7e452