This was pointed out to me by Arolaide.

http://forums.worldofwarcraft.com/thread.aspx?FN=wow-customer-service&T=98705

Something has happened all of a sudden that enchants that are recently put on something are VANISHING when the player zones in many cases. Avoid any enchants until this is gone.

ya I saw them announcing that every time I zoned in to a new area yesterday