Last modified: 2010-09-11 09:20:22 UTC
While skin and extension CSS are being flipped, and now Vector is even outputting it's HTML flipped, since site CSS is not yet run through ResrouceLoader, it's not being flipped yet, and could cause issues.
Fixed in r72743 by moving site CSS to ResourceLoaderSiteModule. Also vector now uses $wgLang instead of $wgContLang to decide which way to render it's HTML.