I have noticed that lately (the last 2 weeks) the number of pages indexed by yahoo for my site has been going up and down like an yo-yo. Two weeks ago i was having a lot of traffic from yahoo, but now, that it started google dancing, i get squat. Anyone else experienced this ?
I've seen that before using the site explorer. One day I'd have 9,000 indexed pages, the next 19,000... and the next, 9,000 again.