Originally Posted by scoow

Your flight miles/points will post as of the date of the flight (27 Feb), regardless of when they actually appear in your account. In order for points to "count" for a challenge, you must sign-up before the flight posts to your account. So, for a 27 Feb flight to count toward your challenge, you would need to call ASAP (if it's not too late) & ask to start retroactively as of 2/16.

Unfortunately, if you were Plat due to a challenge in late 2007 or sometime in 2008 and have now soft-landed to gold, you are not eligible to re-challenge. You will have to wait until March '10 when you lose Gold in order to complete another challenge. (Unless this changed with the new rules & fees, but I have not seen any posts to that affect.)