I think I've found a bug with the "results per page" boxes in the search. I tried searching for nhibernate and one to many:
Clicking on 10,30,50 all returns about 3-5 results, and then paging through seems to bring back an arbitary amount of results.
Page 4 appears blank altogether. It looks like to the relevance tab is the main issue.
Update: I'm using Chrome 9