I have seen yet another site, in fact proxysites.ca take a huge dip in the rankings just over the weekend.
Bed time on Friday, it was at number 8.
Bed time on Sunday, it is at 31.
I have not touched anything over the weekend.
Back about 2 weeks ago I switched the recip links on 3 of my top lists. So if you wanted your site linked to Juvos, you have to put the recip link for proxysites.ca in it, visa versa. 3 way exchanging, but I have no other clue what it could be.