Page is a not externally linkable
-- Yahoo Search Engine and Directory
---- Big site not on Yahoo
martinibuster - 7:35 pm on Feb 8, 2010 (gmt 0)Thread source:: http://www.webmasterworld.com/yahoo_search/4076445.htm
Not saying this is it, but... it could be your site was reviewed for quality and they saw something on your site that was enough to flag it. It's been known to happen.
Brought to you by WebmasterWorld: http://www.webmasterworld.com