This is the update to the ticket I raised with Quidco on the 3rd April 2007, 2 months after using their site for the first (and currently only) time:
Hi, We are pleased to announce that, as part of our strong and continued commitment to our members, we will are clearing out of our own pockets earnings enquiries that are still in "sent to merchant" status for the second half of 2006 and all of 2007. Your enquiry falls in this time and is now showing added in your earnings. Payment for this enquiry will be made in this months payment run. Kind regards, Quidco Member Support
Interesting way of phrasing things. I can't help but feel that there's got to be something that they're not telling us.