Can't Train Skills in the Cataclysm Beta

Sadly, there is a major bug in the current build of the Cataclysm Beta that is preventing a number of characters from training any skills. Apparently any character with two primary professions is unable to learn any new skills. Specifically, the "Train" button in the interface accessed at a skill trainer will be permanently grayed out so long as the user has two major professions (such as Alchemy and Herbalism or Inscription and Enchanting).

This poses a significant problem for copied characters, especially considering that some low level skills need to be relearned after coping. As an illustration, my initial foray into the Cataclysm Beta yesterday was limited to an overview of Cataclysm interface changes because after setting up my Druid's Feral Tanking Spec I came to realize my toon had forgotten how to shift into Bear Form and I was unable to retrain it. Bummer...

There is a workaround for those who can't wait for the bug to be fixed. If you delete one of your two professions, the trainers resume working properly. I will be waiting a little while to see if the problem gets ironed out as I don't want to preclude myself from testing out what Cataclysm has in store for both Herbalism and Alchemy. If you aren't that into testing professions, however, and want to jump right into your new skills, can a primary profession and be on your way.