I'm not sure if other themer know what I just learned, so I thought I should tell it here. Here is a screenshot of Rhapsodized:

This progressbar is on a sheet and most of my themes have this problem.

Until now I did not know what was causing them, but I was working on a theme and tried making indetermined progressbars with transparency and it did not work well at all. So I redid them without transparency and they worked better.

I also noticed that inactive progressbars should not use transparency either, then they would get a flicker between opaque and transparent. It's best to use "fake" transparency.

The problem with sheet would still occur though. Then I realized that this was because I had transparency above and and under the progressbars (in the Rhapsodized theme only above though). So what I did was that I included the part of the progressbar "slide" that is inside the progressbars image area. And then theylooked like they should on transparent sheets! I might be the last to realize this, but if not I hope this info helps someone. I will see to this bug in my themes as soon as I can..

To sum up - dont use ANY transparency in progressbars!



Also, now that I've written this I realize that this might be a good thread for themers to ask questions about tricky parts in theming. So if you have any - bring 'em on!