"I'm bookmarking warez sites looking for Nero cracks. What could possibly go wrong?"
thebugs.ws is one of the sites added as a bookmark by the favadd-d trojan, which can be a drive-by install. But that's on IE only, I think. Ad aware probably flags it since it may indicate a favadd-d infection.
Since this bookmark includes the search terms, it was probably a deliberate bookmark and as such, it's safe.
Symantec owns symantic.com, so that's safe, too.