Haven't been here for a while but needed to see if anybody else is seeing the same!#!@$! as I do. Found this thread and other people that are in the same situation as I am.
My results in Google, and hence the hits, have been up and down for the last month and I can't for my life figure out what is going on.
The hits vary about 50% and one day I get 15,000 hits and next day 7,500 hits. Have been careful not to change a lot of things, not even adding new stuff since I am kinda' thinking that for every new thing you add, you add more "key words" and the more keywords you add the worse it gets if they are not within your theme.
Like everybody else here I see a lot of trash sites getting higher in the SERP's, SERP's that are not even relevant to what you are searching for.
At work I was searching for DLL's and it takes about 10-15 pages before you find any type of a good site. And that's just one search. Results are just crappy and it doesn't get better!