aah damn. I was using the theme name to path in the background, so it can be different with the theme. Unfortunately I guess this gets translated. Ill sort out a fix when I'm back from Holiday. In the meantime you are better of using English, since the translations are completely out of date anyway (And hardly anyone ever sends in updated translations).
BTW please open a ticket on the actual bugtracker.
I did a quick fix and it is fixed in r32576 in trunk. In the meantime you can always switch to the green theme, which will work in any language with background
Hi, I tried r32576 and the error persists. the momentary solution I'm using is rename the folder Skin default to Blue.xpr and copy Texture.xpr as Blue.xpr in media folder. in this way I have three themes, one that does not work, blue and green
as I just said, "Skin Default" can be removed, it was removed in the next commit. it should be using the skindefault folder now for the default theme. if you are saying it isn't then you need to post a debug log. thanks.