Adblock Plus

I'm running FF 2.0 on XP. I had installed ABP soon after upgrading FF. I enjoyed a week of blissful ad-less browsing, but today no ads are blocked. I tried getting the latest dev build, uninstalling and re-installing. Nothing works. Any thoughts?

PS: Thanks for all you're doing. I can't tell you how much more I enjoyed surfing without all the ads.

I can't believe after all those months in tech support I forgot the default of just rebooting your system. That fixed everything, and ABP is happy again.