Outlook 2010 with digital sig conflict

Using Outlook 2010 with v7.0.1426. In Outlook I have a couple of accounts, one setup with a digital sig. When I send emails with the digital signature (using account that is not the default account), outlook complains that it doesn’t have a valid certificate for the default account, twice, then sends the email.

Problem goes away when outbound scanning in Mail Shield is turned off. Started happening with upgrade to v7.

Its a minor problem now that I know emails are being sent OK, but annoying nonetheless…

Cheers,
Danny