I also had a problem with the adobe pdf form not getting submitted when
Thunderbird was the default email client. In my case I was getting an
error message. Internet Explorer and Thunderbird were both set to
Thunderbird as the default email client.My fix:Go to Start -> Control
Panel -> Add or Remove Programs -> Set Program Access and Defaults [on
the left] -> Custom, and set Mozilla Thunderbird as your default e-mail
application.If you're using Windows Vista go to Start -> Default
Programs -> Se...