toolbar spontaneously collapses in IE

i'm displaying FCK on a page below a div that contains other optional form items that get submitted with the editor contents. the optional items can be hidden by clicking a link, which simply call a javascript function to set the display of the div to "none".

i'm having 2 problems with this:

1. when you click the link to hide the top div the toolbar on the editor collapses - even if StartToolbarExpanded is set to true.

2. when you click the link to un-hide the top div IE generates a javascript error:

" 'null' is null or not an object "
someplace in fckeditor.html (you know how bad the error reporting is in IE).

it's almost as if the editor partially unloads or something.

has anyone seen anything like this? any help would be greatly appreciated.

thanks.