We just received this email from Amazon:

Dear Associate,

On Friday, we discovered we underpaid you for a small percentage of your marketplace orders in the first two quarters of 2003.  We’re crediting your account {sic}, our best estimate of the additional amount you are owed. 

We’re in the process of going through all our logs to determine the exact amount you’re owed.  If we find it’s more than what we’ve credited you, we’ll make this adjustment in your next quarterly payment.

We also estimate that you’ve sold {sic} more marketplace units in the third quarter than are currently listed in Associates Central.  The issue was that a small portion of 2003 marketplace sales was not being tracked through August 16.  This has been fixed and starting August 17, your marketplace sales are being tracked correctly.  We’re working on amending your reports from July 1 through August 16 and will post a message in Associates Central when they’re up-to-date.

We apologize for any confusion or inconvenience.

I do not know if this impacted just us or every Amazon Associate during this time period, but it’s nice to see an affiliate program that will admit to and correct their mistakes. Watch your email and Amazon stats for changes …