Current version:
http://alexwilson.dyndns.org/filez/galleria05.zip
Live:
http://alexwilsonphoto.com/
As for the IE6/PNG problem, I figured out why pngfix.js wasn't working -- it just runs once on page load, so it doesn't help with dynamically loaded images like jCarousel. Right now, IE6 makes about 30% of the browsers -- sizeable, but I'm probably going to ignore that problem for a bit. The easy solution at this point is to just make non-transparent arrows the match my background.
I've also seen intermittent problems where the thumbs load up in the jCarousel scroller either stretched or at a funny offset. Not sure what the cause of that is, I've only had it happen in IE on my machine, but I've seen in in both IE and FF on others. Odd. Any insight from anyone on how to solve that would be most appreciated.
Other than that, things seem to be working well. A few other notes/warnings:
-I haven't yet really cleaned up the code at all, so CSS is spread all over the place, hardcoded links, hardcoded image sizes, etc.
-Don't expect image.php, archive.php, or search.php to look nice or maybe even work -- I'm not using them on my site at the moment, so I haven't touched them.
-I've got my gallery set to use 600px images, and 85x85 thumbs.
-I also have the images and subalbums per page limit set to 999.
-Comments, ratings, and search are off. You'll also have to keep it set on the dark theme colour setting.