The only race which recieves an XP bonus are halflings (5%). The only classes which receive an xp bonus are warriors (10%) and rogues (9%). (so Halfling warriors/rogues get 15%/14%). These XP bonuses appy to XP for leveling, but NOT AA xp.
the XP penalties were removed when TSS was released (patch notes).
Quote:
*** Miscellaneous ***
- Race based experience penalties have been removed.
- Race based experience penalties have been removed.