Have reactivated my CS3 (with great effort) and it has worked OK. But now it gives an error message that the licensing has stopped wotking and wants me to reinstall. I thin this is really bad service and you should correct it yourself without bothering your customers.
Good luck. PS refused to activate my CS5 which was fully licensed. They are playing hardball to get everyone to licence PS. The aftermarket in selling used copies was killing them. I was royally PO'ed with them until I used the upgraded leased PS on a trial basis. It is a vast improvement. As soon as I get my new computer updates sorted out I'll be getting the leased PS. I did the math, and even as a hobby it is not a bad price to pay, about $10/month. I've been dragged into the future...kicking and screaming, but it's worth it, IMO. ..I just hate to be at their mercy so much.