Last modified: 2014-11-18 18:07:13 UTC
The way wikitext is parsed in [[Special:Booksources]] differs slightly from the way it is done on a normal page (such as [[Wikipedia:Book sources]]). For example, <div /> will be transformed to <div></div> on the latter, but not on the former - probably a call to the sanitizer or Tidy is missing. Not sure if this counts as a bug, but it can be annoying - I just spent half an hour hunting down a layout problem on the special page, which turned out to be an error in a widely used template, which is corrected by the parser on every other page so no one realized it before.
Sanitization is disabled for core UI for performance reasons -- unlike random-person-edited general text, they're supposed to be maintained by admins who can check and fix up their markup.
