I got the usual email which I'm not concerned about as manual re-validation usually sorts it out But it's just occured to me - if i've got 5 accounts all bound to a master account - does one site failing mean that all ads in the master account are out of rotation or just ads associated with the account that failed?
If you have your account binded to master account then your weight from the site not validating wont be considered. Your ads will be on with weight from rest of the sites.
OK yeah, I know about the weight - but let's say I only have ads in the master account - are you sure these unaffected if one of the sites doen't validate - the email seems to suggest otherwise?