No it hasn't changed. I'm in the same boat. Apparantly my unit has one other registered user. I have back tracked to the person I bought it from who contacted the person who he bought it from who contacted the dealer who he bought the used bike from with the Sat Nav fitted.
Apparently that dealer does not wish to get involved in any third party inquiries, which is most unhelpful.
I have only spoken to Garmin once via webchat and their take was that I had to either be the sole registered user or have the original receipt for the unit.
It seems Garmin are being unnecessarily obstructive. I don't think it would be overly difficult for them, providing there was no suggestion that the unit was stolen, to either contact the previous registered user to get them to delete the unit or actually delete the unit itself from a previous registered user.
I wonder if their attitude is that why offer continuing customer support to someone who didn't purchase their product. I would argue that we pay a premium price because units have a value and ultimately we can recoup some of that later down the line by selling it on.