It would be nice to have in Popup_Editor, and any 'other widget dependant object' an IsActive dynamic property
I just came out to the conclusion that if my link is disabled, and popup_editor is loaded, IE7 does not like it because somehow it doesn't find the link.
I had to manually add an if to the popup widget with the same "visibility and enable" conditions for my link...
Interesting also would be if Service Studio warned me about this "might happen" situations. (although this seems to be an IE7 thing, it does make sense)