Unfortunately it looks as though z-indeces won't fix this one. It seems that IE is taking the view that table information can't be relocated outside of the table.

Safari has a slightly different twist. It allows the information to show until you scroll down the page and then back up again. When you return the top of the left column is missing in the same way as it is from the outset in IE.

I rather suspect that there is no way to resolve this. It's simply the way that IE (and I guess Safari too) are going to interpret your escaping data. The only option that I can suggest therefore is to direct your attention back to the approach I proposed in the 2nd post in this thread.