One day I checked my google analytics and there was like a 60% drop in search traffic. There was no panda updates in that time.

I checked my webmaster tools and saw about 200 spammy sites linking to mine that did not link to it before.

So I figured I got penalized for having lots of spam sites linking to me.

I sent a reconsideration request to google, and they said it wasn't a manual penalty, so they can't do anything.

Any idea how I can get de-penalized from all these spammy links?

Thanks!