Like many open source projects the web site is full of geek speak and there is no easy way to give feedback or ask a question. To add to the confusion, the home page at http://themechanger.sourceforge.net/ has links to a lot of theme sites that make themes, apparently for ShapeShifter in the guiKit format - which don't work in ThemeChanger. The only theme that does work is Iridium; if the other themes won't work in ThemeChanger, why bother linking to them on the site? If these linked sites have any themes which will work in TC there's no easy way to find them. It's a great way to waste an afternoon figuring this out for yourself.

That said, the Iridium theme does work and is easy on the eyes. But I don't see the point in developing an app that is incompatible with the vast majority of available theme files.