Thanks Dave.
You verified something that we'll have to deal with in v1.2 and is something some of you techies may find interesting for what it's worth.
So, in the old days, video cards had say 64MB of memory. When they ran out, they dumped their memory to disk and the game would, when it sensed a certain threshold would "dump" textures out of main memory.
Fast forward to 2010 where video cards like yours have 2 GIGs of memory. First, this is largely a waste because games are still 32-bit but you're well future proofed at least. But what happens is that these video cards fill up in memory (using up the process space) and pow, the game runs out of memory.
What we have to do in v1.2 is dump the texture memory of unused objects. This is kind of a shame because in 2 years when games are all 64-bit, this sort of thing won't be necessary. But right now, it is.
Thanks for your report!