Sweet, that's great to hear.
I googled for that error message, and what I gleaned based on reading a bunch of the threads was that it wasn't directly related to the DRM vouchers, but to a Local Shared Object (aka Flash Cookie) that was probably maintaining your login session. My guess is that the content providers had to restart their Flash Media Servers, and the LSOs associated with the content provider then referred to a session that no longer existed or something. Blowing away the LSOs seems to fix it. Given that blowing away the LSOs does resolve this problem, logging out of the content provider's service completely and then logging back in would probably get you a new session token, which would most likely also resolve instances of this error message.