As posted on Webmaster World some webmasters have reported a cancellation of their AdWords account.
"I logged into my account today to find the red box notifying me that the account was canceled, couldn't be reactivated, and to contact them if I have questions about the account. Also, I can't make any edits 'while' it is canceled. That infers there could be an end to the cancellation.
It is a small account, between $100 and $300/mo. To my knowledge, I've done nothing wrong. I've had payments rejected before, but the account is current, has been for some time, and hadn't been altered for several months. During those months, the only active campaign was for one hotel property. The landing page has 2 adsense blocks, some affiliate links, unique editorial content, unique images and links to the other unique property pages.
It's not terribly important, it is a tiny % of traffic to the site. Adwords wasn't something I had found to be particularly profitable in my situation, and there are other alternatives. But is perplexing, and somewhat insulting."
Tamar Weinberg in SERound table has a copy of a letter sent to webmasters who suffered the same plight:
"Thank you for your email. I'm sorry to hear that you've had trouble with your AdWords account. We've identified a known technical issue affecting a limited number of accounts. Our engineers are currently working to solve the problem and hope to reach a resolution shortly. Also know that I have reactivated your account."
Apparently, the problem affected only a few accounts. Besides the reasons for the 'technical issue' still remain unknown.