Folks: Appreciate it very much if someone has similar experiences to share -- My parents came to US last month. They got a B-2 visa in December with one year validity (until Dec 2006). When they entered, the immigration officer didn't write down a date on their I-94s. On the I-94, there is a stamp saying "Class _____ // Until _____". After "Class", the officer did fill in "B2", but nothing after "Until". Is this a mistake by the officer? What should we interpret their valid stay period? Thanks for any comments.