I'm an American student studying full-time in Venice (I've been here since Sept 2010). I renewed my Permesso di Soggiorno in August, but it's still not ready and from what I understand now, this year it can take up to 6 months to process. The last few years it only took 3 months.
I have already booked my tickets for Dec 12th to go home to the US, but I have a transit in Germany.
Will I have problems transiting?
I will have my renewal receipt, the old Permesso, and my American passport with me.