I've of course noticed all the similar bugs such as the "temporarily unavailable" issues, but those are usually resolved with closing the browswer and reopening it. My biggest peeve about the site though is that when I used my coupon code (pk075) it took off SIGNIFICANTLY less than the 50 dollars for a 200 to 300 dollar flight it promised. Most of the amount taken off of the final price (maybe this is due to a pre-tax deduction or somethign that makes most flights under 200?) came to around 25 dollars with only one of them coming to around 40. They probably use the same calculation system through offline bookings as well, but next time i'll surely at least try to get the full value of my coupon by calling should I get another one....