Login to your Google AdWords center and check your statistics. A WebmasterWorld thread reports a "2nd Adwords Billing System Problem." Like we had in late August where Credit Card Processing Errors Halt AdWords Buyers from Advertising, a similar issue has occurred yesterday and was fixed quickly the same day.
1) The billing system has not begun charging me at regular intervals again, and pending charges are racking up way beyond what is normal (this also happened right before the last billing glitch too).
2) I'm also showing that the "authorization" from yesterday is not actually being closed out into the billing summary today (and my account is still adding up 5 days worth of charges in my "pending" total).
AdWordsAdvisor confirmed the issue and stated it should be fixed;
AWA and I have been working on this one with our billing team. They think this issue should be resolved, so if you are still seeing it in your accounts, could you StickyMail me your account IDs?
So check your stats and view the WebmasterWorld for more details.
This article was written the night before, and scheduled to go live at this time.