Hi Rick,
The artisteer30-flashclouds skin is now fixed in the source code repository. I managed to get it working with little tweaks in the flash parameters but not really sure which little tweak solved it. I remember going through the same process when I first converted that design to an early beta of Artisteer 3. Possibly re-exporting the design in a newer version broke it again and this accounts for the different versions of mojoPortal you have where some work and some don't. In previous versions it was exported by different versions of Artisteer and in 2.3.6.5 it was re-exported in the latest RC. I guess that broke it again and I didn't notice it until you mentioned it.
Once it was working it still had some issues where the clouds were being clipped, but I was able to solve that also with minor tweaks to the flash parameters. It was all trial and error to solve it. I'm wondering if it may be a factor that this design was initially created in older versions of Artisteer and then upgraded, maybe it isn't quite the same as a design created from scratch with Flash in Artisteer 3.
I also noticed that all of the artisteer30-* skins were showing a horizontal scroll bar on the bottom of the page. I haven't been able to figure out why it does this in the skin but not in the exported template. I tried chopping out all other css except the style.css exported by artisteer and the problem was still there. I was able to fix it by adding this to style-artisteer-oveerides.css for each of the artisteer30-* skins:
body { overflow-x:hidden; }
Best,
Joe