I'm still working on a real fix for this, but for the time being, either of the following work:
* Choose a Thread View other than "Standard" (the "Standard" one is the only one to throw a fit)
* Resizing the window also fixes it.
I can't seem to figure out the root cause of the bug. I know that this particular bug doesn't happen in IE8 (at least it didn't for me).
Furthermore, the text stays until you move your mouse over the content. It's not javascript related, and seems to be CSS related, but it looks like a rendering bug of some sort (one that I've never encountered before).
I'm sorry it's taking so long to fix.