On Sun, 27 Feb 2011 21:49:53 +0100, m0n0 wrote: I know, that was the point - to figure out whether the problem was endianness in the core or something in the frontend. As it works for you, the problem must be in the frontend somewhere. I compiled my port with full Cairo plotters (code is pretty much identical to the gtk plotters) and it still does it, so I'm tending towards something in the bitmap plotters not being quite right. A nose through the mess of CSS on Wikipedia shows that those tabs have PNG background images from a data: URI like the following: data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAABkAQAAAABvV2fNAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAABVJREFUeF7dwQEBAAAAQCDTTfdD4WOJ5TIB3ib9EgAAAABJRU5ErkJggg== I pasted that into the NetSurf URL bar and got the following assert: assertion "!c->locked" failed: file "content/content.c", line 746 So I suppose that needs fixing before I can figure out what's going on here. I did try it in another browser and that data: is a white line, which is pretty much what I'd expect. Chris