Is Everything Back To Normal With Mischa?

Mischa Barton was photographed leaving the Cooper Square Hotel in NYC last night, and not only did she show off her new brunette locks, but it looks like she was in the mood to show us some skin too! This dress kinda looks like it came from the Frederick's of Hollywood clearance bin, but Mischa does like pretty decent right? I mean, all things considered...

But uh, what was she doing out partying? Didn't she just get released from the psych ward less than a week ago? And even if she wasn't drinking, is going out on the town the right move for the troubled starlet?

P.S. What's that stain on Mischa's tush? Fergie style accident or did she spill her beverage?