Lavasoft have posted Build 181 of Ad-aware 6. A fairly important revision indeed, here's some of what's new;

Speed More comprehensive & up to 400% faster than any previous 6x release.
Smart scan mode Improves speed even further & has been optimized to detect content at the root level enabling fast & efficient maintenance scanning.
HOSTS file scanning Newly discovered exploit that uses HOSTS file editing to facilitate browser hijacking has been countered with this addition. Now Ad-aware has the ability to scan, backup, remove, & restore known references from your HOSTS file.

Warp2Search have the full details if you need more information on this Build. Download Now.