frame problems with imp

[Stephan Grallert]

Hi all!

If I click on a message to read it and then afterwards won't click on return
to inbox but on Inbox on the left bar the message frame extends to the whole
imp frame and the command-bar is gone.
And every time I click logout on the imp-bar I get an error.
This actuallay the top.opener.parent... problem, but the advised action in
the imp faq didn't help.
Problem is the same with IE 5 and Netscape 4.7

config:
imp 2.2.3
newest horde

any ideas?