I brought up an X1 project.  Perfect space had what looked like a border around it - bad graphics or something just w/in the outline.  It works fine, but won't dock.  Another program wouldn't, either, but I can't remember which one.
 
Anyone else seen such behavior?  Or is this normal for a 32 bit program on a 64 bit computer?
 
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This is because it's 32 bit, yeah. The Bit Bridge window doesn't go in the multi-dock.

Thanks John, thats what I thought.  Moving to 64 bits is full of surprises - some good, some not so.

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I wonder if perfect space will ever be 64bit..

Voxengo hasnt upgraded its bigger brother either.