YahooPete - 10:22 pm on Jan 9, 2009 (gmt 0)

@Tropical Island…

I checked with the folks here who are managing the Account Optimization program, and they told me that turning Content Match on or off is not part of the program. So while I can’t say for sure why your settings might have changed, it wasn’t due to the optimization program.

As Zamboni pointed out, the “master setting” under the Administration tab in your account has the ultimate control over your account: If that account-level setting is set to “Off,” you should not receive any Content Match traffic in your entire account, no matter what the settings are at the campaign or ad group levels. We designed it this way to give advertisers more control of their tactic settings, so that certain campaigns could be set up solely for Content Match traffic, and others solely for Sponsored Search traffic.

Hope this helps.

- YahooPete