I quote:
"In the new edit toolbar, under Help > Files, the sample image fails to appear in Internet Explorer 8 (a broken link icon appears in its place). The correct URI is http://en.wikipedia.org/w/extensions/UsabilityInitiative/images/wikiEditor/toolbar/example-image.png, but IE is referencing http://en.wikipedia.org/wiki/extensions/UsabilityInitiative/images/wikiEditor/toolbar/example-image.png, for some reason."
Works just fine for me in Safari, but haven't been able to look at it any further yet.
Version: unspecified
Severity: normal
URL: http://en.wikipedia.org/wiki/Wikipedia:Requests_for_comment/May_2010_skin_change/Bug_reports#Sample_image_-_broken_link_in_IE8