This tidbit was nestled among the new round of official Patch 5.2 hotfixes posted today:
Using a potion while under Stealth/Invisibility no longer causes the potion to go on permanent cooldown.
This should fix up an issue a number of folks have reported on their rogues in which they used a potion while in stealth (typically a Virmen’s Bite just before a raid boss is pulled) only to find that their potion cooldown wasn’t starting as it should, thus leaving them unable to use another potion during the fight (and defeating the whole purpose of “pre-potting”). In fact, it left them unable to use another potion until they logged off the game entirely.
I hope you’ll all join me in breathing out a huge sigh of relief that Warcraft rogues no longer have a drinking problem.