Thats because someone typed in that username with a trailing space character ("mtgx ") and it made a new entry for that username int eh database. Nothing a little .strip won't fix...
For an account only 290 days old, mtgx has a ton of karma. Any idea who that is or where the karma comes from? Don't see many highly rated posts or comments in their feed.
Submitting stories. Whoever submitted Bellard's jsLinux story received as much karma (3000+) for that one URL and title as I had from several years of comment writing.
