I got not exactly the same problem, with the new CP.
When I open my Tradeskillwindow (using Addon Anhanced Trade Skill Window, Trades: Enchanting 340 and Tailoring 370) and the Game chrashed. So I disabled the Addon (Adv. Tradeskill Window) but no change.
After testing it with my Twinks I found that I only got this problem with my Main Lvl 70 with the new recipes. On Twinks it only takes a very long time but the scanning works.
So I try to scan the Main a view times and then disabled the CP. I'm not very lucky with this. Mayby I do something wrong or another Addon I got running is the Problem but I don't want to clear them all. So I hope someone can say if it's a bug or I have to do all the work to built my Interface new.
I'm a german User so sorry for the bad englisch.