'nodeName' ist Null oder kein Objekt

[albert]

when in editing mode i can scroll with the scrollwheel, but when i try to move up or down the scrollbar with the mouse following message comes:
Meldung: 'nodeName' ist Null oder kein Objekt
Zeile: 33
Zeichen: 6143
Code: 0
URI: http://testcmsimple.natur-und-handgemacht.de/FCKeditor/editor/js/fckeditorcode_ie.js

it happens only when using IE (seems not to have bad effects...)
greetings albert