Yeah, that's so weird! We've heard that from a few people. We're currently looking into it. Neither of us can find any history of the domain being used for anything adult or porn related. So strange.
http://web.archive.org/web/20040601000000*/http://tripexpert...
The domainauctionhouse page had a link to domains for sale, which had an Adult section. Maybe the links to domains with bad words in them caused it to end up on filters.
http://web.archive.org/web/20050205024618/http://www.domaina...