It's possible the MS Explorer browser you play on cannot display avatars correctly any longer (we're looking into this now.) If that's the problem, changing browsers then updating your avatar appearance will fix the issue.
After you switch, your avatar will not update and fix itself until you redo your appearance.
To change your Avatar's physical appearance (height, weight, hair and skin color, etc.) you need to go to the Looks Section.
Click the Vegas World button in the far upper left of the Vegas World display.
The button will change to My Profile, which you will click (so you're clicking in the same spot twice)
Select "Looks" from the list that appears.
From there you can change many aspects of your avatar's appearance. The only thing you can't change from this section are the clothes you are wearing.