Have you tried re-entering your serial number?
I did, and this fixed it. I was under the impression that since Photoshop now reported to be the Extended version it was expecting a serial number for Extended not Standard. Someone on photoshop.com also explained this, that all trials of photoshop are Extended versions until a serial number is entered for either Standard or Extended.
Ok. I just upgraded ACR and did not get that issue. Always a glitch somewhere I suppose. Glad you are back up and running.
I upgraded CS6 and Lightroom 4 today and then when restarting Photoshop CS6 this evening I get a dialog about registering with my e-mail for Photoshop Extended Edition Trial.
I have never owned the Extended edition and did the update from my existing product using the Adobe Update manager. There should have been no reason for this mistake to occur.
I've done upgrades like this many, many times before and have never had my system react this way. You clearly have a bug in your update process and should fix it pronto. Do you know how confusing it is to get a dialog like this? Should I let it register me for a product I don't own? Is that going to somehow trash my legitimate license (now there's the process of activation, I'm always concerned that I'll mess things up and end up unable to use Photoshop until support can help me out)
I'll go find my serial number and re-enter it, but I think this is a serious bug - and will make me much more cautious about waiting to apply updates until I've read the forums to make sure it's safe to do so