Here's something I ran into the other night as I was adding files to my "Big Band Swing!" thread. As I was in the advanced editor and moving the WAV files around, I had overlapping text all over the place. This also includes various text areas skewed and all sorts of alignment problems.
I should have grabbed a screenshot, but I didn't. What it seems to me, is that the CSS coding went haywire and it happened once before, when I was editing the "Starlets of the Silver Screen" thread.
This only happens if there's file management going on, I haven't seen it happen when only text editing in Advanced mode.