On https://de.wikipedia.org/wiki/Wikipedia:Fragen_von_Neulingen a user reports that MediaViewer is broken in IE 8, which I can partially confirm (using the IE8-mode of an IE 9):
Clicking on any image in an article shows just a black screen. I was redirected to the image description page after a few seconds, but the reporting user seems to have no way to access the image.
Clicking "Expanded view" on an image description page shows just a black screen, too.
A JavaScript error is shown in the console, saying that some object doesn't support the method addEventListener ("Das Objekt unterstützt die Eigenschaft oder Methode "addEventListener" nicht." in German)
So please either bind the events in a way that works in IE8, too, or just disable MV in IE8.
Version: unspecified
Severity: major
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=70744
https://bugzilla.wikimedia.org/show_bug.cgi?id=70932