A potentially dangerous Request.Form value was detected from the client A potentially dangerous Request.Form value was detected from the client

http://www.cryer.co.uk/brian/mswinswdev/ms_vbnet_server_error_potentially_dangerous.htm
http://support.sightmax.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=45
http://forums.asp.net/p/1235144/2239950.aspx
http://www.asp.net/learn/whitepapers/request-validation/