If you are promoting Kayak.com, do you closely monitor their reporting on your Linkshare Individual Items Report?

There is clearly a problem with their reporting. I'll go from having dozens of sales report for several days in a row and then a day without a single sale. Kayak denies any problems at all. I had a call scheduled with them a few days ago that I had to postpone but plan to reschedule it this coming week. In the meantime, it happened again today (yesterday's activity). If nothing is resolved this week which I don't expect, all their links come down.

They are a new Linkshare merchant (about two months or so) and have good potential but I do not promote merchants who do not pay for my traffic and deny problems exist when they do.