Them wiping hunter pets in beta might mean a lot more than just "fixing a corruption issue".During the standard beta realm maintenance on Thursday morning, we will be wiping all pet data for hunters and warlocks to fix a data corruption issue. Hunters will need to tame new pets as a result of this change, while warlocks should simply notice that their pets' names have changed.
It might do things to certain [untameable] pets we just found out about and everyone went out and tamed on live... or it might "fix" certain other pets from merely changing skins from live to Cataclysm...
Then again I could just be paranoid.