Yahoo's problems with its ad system after an update two weekends ago are still refusing to go away, and the system has been malfunctioning for a week now, according to various advertisers and observers. The problems were precipitated by the Yahoo Search billing system which, after the update, began ignoring budget limits and was subsequently shut down. Other issues, including malfunctions within the bid system, compounded the problem.

Although ads continue to run and advertisers can now access their accounts, some advertisers' credit cards and bank accounts have been and are still being charged continuously for amounts several times over the budget they had set, advertisers have told MarketingVOX. Though Yahoo may reimburse these greatly inconvenienced advertisers, the process is not likely to be pleasant.

Over the weekend, MarketingVOX failed to reach Yahoo Search's spokesman for comment. Last week, Yahoo's Gaude Paez told MarketingVOX that the upgrade caused "unexpected issues" and that their engineers were working around the clock to fix the problem.

According to various advertisers, however, Yahoo has not proactively contacted them to inform them of the ongoing problems, and others say Yahoo has also not returned calls or responded to repeated requests for answers.