Yeah, I know, guilty… Turns out the reason my Visual Studio 2008 has been having TypeLibBuilder.exe crash constantly on client side script is the dpAgent.exe helper process from DigitalPersona. If you kill the process all is happy again. Thanks Josh. http://jberke.blogspot.com/2008/05/typelibbuilderexe-crashes-javascript.html Technorati Tags: TypeLibBuilder.exe,DigitalPersona,fingerprint,reader,Visual Studio 2008,crash