Nope, I'm using 2.6a4 almost exclusively.
I know you believe you are a bit messy and dont like to reveal your source, but if you would like me to take a peek
I'll be happy to. PM me a link if you like. I've done a number of 2.6 plugs and they seem to work OK.
I had myself started out doing a Fingerprint plugin, but discarded it what I saw that you had posted one already
(had only just spent about 1/2 hour on it so was far from doing anything).
EDIT: Nice job on the fingerprint strip you posted, looks great.