Oh gosh, thanks for this post! I got my dreamhack last year and never touched it once beyond changing the password, but now all of a sudden I log in there every single day and despite all my wiki reading it never occurred to me that I might not be on the default branch. I just did both 'hg update -C default' and 'hg update -C tip' and wow. Wow! That's a scary number of updated files, right?