User blog comment:Kirkburn/Photo gallery launch/@comment-1025281-20100326172632

Yes, I've noted that on MA as well now. Sorry about that. If you replace to the following, it should work:  The !important must be there.

The reason the articles are varying between old and new galleries has to do with cache. They'll update eventually, or you can purge the cache.

On the vast majority of wikis, the old galleries always aligned to left. Perhaps the MA admins changed this somewhere, I'm not sure.