Interesting, my "used" PE have dingo 1.13 on it, but new PE came loaded with latest dingo 1.8. I have upgraded new one to Ermine - so far runs smoothly and I like that version. Still cannot sync calendar/contacts to MS exchange or Google, but will keep working on it... And I did registered "used" one on Entourage website (just haven't upgraded yet) last night and got some apps and free books from there...