This has never happened to me before. At first I thought it was a Build 619 thing (which I have other issues with, but that's for another thread). So I launched RB and I'm getting the same issue (ran as admin, ofc).
The really odd thing as the various meters and stuff in the plugins indicate that they are receiving a signal...so it's not like the whole chain is somehow being bypassed. :-(
Any help would be greatly appreciated!