The various changes to poison and so on is interesting, yes, but there's a far more important change that came with 3.1, and it wasn't in patch notes. TBC stealth animations are back, for certain race/gender combinations. My undead female Rogue now makes the Benny Hill themesong play through my head in stealth in PvE specc, and god forbid using the Pvp specc with movement speed increases...
I can no longer play my current main without feeling like punching the monitor...
Anyone else have this problem?