Are you certain about that? I manually reverted the vandalism, but I saw no evidence of my account making any malicious edits.
When I looked at the change your account made, the diff just changed the vandalism to different vandalism. It's now gone, of course, since I restored an old backup.
Also, it's worth keeping in mind that just reverting the database is likely not to be very effective on MediaWiki. It seems more likely to me that some of the vandalism persisted in its cache, and that making an edit restored it.
The Southern Hemisphere page wasn't listed in Tom's original list of vandalised pages, so it's not at all clear whether there
was any original vandalism to persist in the cache. To be on the safe side, I've restarted memcached (I already restarted php when I restored the database before), so now there is no cache from before the database restore.