Hmmm...no matter what I do, windows does not reallocate that memory. I'm talking hundreds of megabytes of memory that are not reallocated. There seems to be nothing automatic about it....at least not in my case.
Sounds like I need to use siding windows (as suggested by Rolf) or just deal with half of my memory being dedicated to a very simple task for days on end.
Re^3: How to return unused memory to OS?