In particular, the Xcfe dusk sheme, which makes fonts white and the background black. However some programs(like firefox) dont handle this properly, making the background white again. (and white on white doesnt read well) I ran it on ubuntu Breezy Badger with Xfce4.2.2 installed via aptitude. You can probably reproduce the bug just by turning on the dusk theme and using the bug reporter i am typing right now in with firefox. (or this website) I tried finding other examples, but switching back and forth shemes is anoying. Maybe it isnt firefox, but just mis-use of some web-feature. Anyway, it is not acceptable to have to select text to read it, so i changed to another theme. (another btw i like darker desktops, lower intensity required to display, con is most that webpages are still black on white, and when i read some of those it takes a short time till i can see more in the darker things)
This is a firefox (and thunderbird, and mozilla, etc.) problem, it misuse gtk colors and most if not all dark themes are unusable in firefox. Unfortunately, there is not much we can do about that...
Thanks, I should check wether the problem persists in Firefox2.*. They probably know about this, sounds hard to miss, so i should check wether they are passing on the blame.
In case someone else stumbles here: I noticed only today that going down the menus preferences::content::Colors::use_system colors, allow pages to choose colors. Turning these two off resolves the problem.