[jQuery] Accordeon - IE6 - selectbox not displayed

Hi,
I got an iframe rendered within an accordeon. Within that iframe is a
form. The select-boxes (and only those) within that iframe are not
displayed in IE6.
I tried: display: block, z-index
removed scripting - worked. It seems to come from the hiding/unhiding
part of the accordeon-plugin. Although the same problem does not occur
whithout the iframe (form elements fine when directly placed in
accordeon).
Any hints?
Mike