User blog comment:DaNASCAT/Technical Update: September 20, 2011/@comment-876022-20110920222542/@comment--20110921182141

Imaging is not the issue here, Ryan, it's the way we are caching image generation. As one of our techs just pointed out - There are only two hard things in Computer Science: cache invalidation and naming things :). We're still on it and I'm confident we're making sincere progress on the underlying issue.

The Special page regeneration is needed if the automatic regeneration fails. For the most part, these pages are still being refreshed automatically.

I am looking into your RS Wiki question now.