Hi i just wondered if anyone was having any problems with the core captcha control as i seem to be getting a lot of the same error triggered by googlebot.  I've spoken to scott as Ventrain and he has mentioned about the problem with it and dotnet 4 but as i use 3.5, i'm unsure if this is related?

AssemblyVersion: 5.6.1
PortalID: -1
PortalName:
UserID: -1
UserName:
ActiveTabID: -1
ActiveTabName:
RawURL: /DesktopModules/DnnForge - NewsArticles/Controls/ImageChallenge.captcha.aspx?captcha=7E568EE587402B5FFE274DB40314909B05450764290CAB8EB655124B0ABE62914551DEC8E7710C3FACBA9F212316A44D6942F9881349BF6CF925938B18B2B5A794D94435A89E44D33333940CECBF74D960A2BBDB719C85603738760B80365C4A88D4652B7E99FB54EC9C65676A686D597F3BAD98B3A763D7166ECE637F8A1DBD2AEF357622EB50080CE8C95263A7CDC35A9BB773C8EAF44AC239F8B0B9950405C876C490710BE7060F5370B5&alias=www.area51net.com
AbsoluteURL: /DesktopModules/DnnForge%20-%20NewsArticles/Controls/ImageChallenge.captcha.aspx
AbsoluteURLReferrer:
UserAgent: Googlebot-Image/1.0
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: b4dd18a2-1615-48b9-b338-1869237c5e7b
InnerException: Input string was not in a correct format.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Number.StringToNumber
StackTrace:
Message: System.FormatException: Input string was not in a correct format. at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) at DotNetNuke.UI.WebControls.CaptchaControl.GenerateImage(String encryptedText)
Source:
Server Name: MYSITE

Any help would be appreiciated folks.
Craig

This error is coming from the Ventrian News Article Module.  I posted about this in thier Forums at Ventrian.com and I see that Criag has also.