This sounds like MSIE's peekaboo bug (do a Google search for "MSIE
peekaboo"). So the first question is do you see this problem in another
browser (e.g. Firefox)?
We had a hack in WeBWorK that fixed the peekaboo bug but it caused
other problems with MSIE ( e.g. labels in multiple choice questions
didn't appear). This was worst than the peekaboo bug so we removed it.
We have not found a hack that fixes the bug and does not have bad side
effects. The hack is very simple so if you don't have problems with
lists, you could use it for a short time and then comment it out ---
not very satisfatory but it might work.
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