A WebmasterWorld thread reports that some Yahoo! Search Marketing customers have turned some of their keywords "offline" to only see them turn back on. One member describes the process that makes this happens as follows:
1) Take some terms offline that you're losing big money on (which is likely much of your Overture account these days) 2) Later, your account runs out of money 3) Add money to your account as usual to bring it back 4) Oops--your money losing terms are somehow back online!
I believe the new Yahoo! ad system will correct these issues with the current ad system.
Forum discussion at WebmasterWorld.