Anybody seen their rankings go down when they start doing some normal tier 2 linkbuilding (wikis, social bookmarking, etc.)?
Here is my timeline:
4 weeks ago: I started 4 new sites, so I could go for some moderately easy keywords.
3 weeks ago: Started doing some tier 1 linkbuilding (~50 web 2.0 sites/new site, spun content).
1 week ago: Rankings have increased, I'm in the top 10 for a few keywords and in the top 30 for many more keywords. I start doing some tier 2 linkbuilding (wikis, social bookmarking, etc.)
This week: All my rankings are gone, I'm no longer in the top 100 for anything.
I haven't done any linkbuilding besides the stuff above - and my rankings are gone for all the sites
The tier 1 links all have different anchor texts and the tier 2 links all have random anchor texts.
Here is my timeline:
4 weeks ago: I started 4 new sites, so I could go for some moderately easy keywords.
3 weeks ago: Started doing some tier 1 linkbuilding (~50 web 2.0 sites/new site, spun content).
1 week ago: Rankings have increased, I'm in the top 10 for a few keywords and in the top 30 for many more keywords. I start doing some tier 2 linkbuilding (wikis, social bookmarking, etc.)
This week: All my rankings are gone, I'm no longer in the top 100 for anything.
I haven't done any linkbuilding besides the stuff above - and my rankings are gone for all the sites

The tier 1 links all have different anchor texts and the tier 2 links all have random anchor texts.