When I try to edit an existing wiki entry in Firefox 4 beta 7, the editing page is displayed with an empty edit area and a "Loading..." message at the top of the page. The message never goes away, and the edit area is never populated with the entry's current text. ("Never" in this case means "within the ten minutes I've waited.")
This could be a Firefox bug (perhaps in the new JavaScript engine), in which case it would be worth reporting the issue to Mozilla now. Has anyone else seen this? Is anyone at Fog Creek testing with pre-release versions of the upcoming major Firefox and IE releases?