Thanks to the LMDE devs for continuing to try to merge Mint with Debian. I'm looking at it as a way of putting a modern environment on an old computer. It's hosted on a 3.0 GHz P4 with 2GB of RAM, which is mostly adequate. With MATE running a Firefox browser, UP7 uses about 440 MBytes of RAM, which suggests that a 512MB RAM system would be adequate. That's good. For some reason, certain programs don't run very well, particularly GIMP. That's not so good (I'm using an Nvidia FX 5200 video card with the nouveau driver). I can't find any useful diagnostics on that one, or I'd have posted a comment.
I, too, am seeing the problem with Caja not displaying thumbnails. I wrote about it here;viewtopic.php?f=198&p=767562#p767562
In answer to cliffskoog's questions:
Is Caja busy building a cache of all the user files? Does its CPU fever eventually subside?
Yes, it is building a cache of proper thumbnails. No, I haven't seen the fever subside. Most of the CPU use, as measured by top, is in the user domain. This leads me to guess that the problem is that Caja keeps looking for some event or file it can't find.
EDIT/afterthough: The performance issue with GIMP and X is a long-standing one, which predates UP7. I just haven't been able to figure out how to describe it in a way that a system builder or soft