Tips:

Ignore files less than 2 MB (2,000 KB) in size. Yes there is pollution on the network due to companies like Overpeer who are sponsored by companies like mpia & riaa & others. The best way to deal with it is ignore it & filter it out. Use the junk filter when you see such results less than 2 MB in size. The Junk filter is a dynamic learning filter so it takes time for it to learn what to filter out. But once calibrated, it's very, very effective!!! For a clue about which ones, see
1. WARNING: Viruses on network you should be aware of! (click on link)

2. autogenerated spam results

3. autogenerated mp3 spam results

4. Sponsored Results (click on link)

5. Direct instructions to eliminate porn from results & How to use the Keyword Filter

Also learn to use Bitzi to see if there's user feedback for the files you're after; How to use Bitzi Web Lookup