[Koha] Koha and IE

Hi all This problem might have been discussed here before but I could not find a post. We encounter problems with opening the advanced tag editor (pop up) within the field 000 and 008 with IE 6, 7 and 8. The problem seems to be the Perl file: cgi-bin/koha/cataloguing/plugin_launcher.pl?plugin_name=*marc21_leader.pl*&index=tag_000_subfield_00_465196_878662&result= Has anyone a solution (beside changing the Browser ;-)? Thank you, Stefan