Starting with Access 2010 beta and now also into the RTM version we have
found that the digital signing of MDE files is buggy. The signing can be done
per normal (open the MDE, go F11 to the VBA window and choose Tools/Digital
Signature). But if you then try to open the MDE after signing you get the
message:

"Warning: The digital signature has been tampered with..."

This problem does not occur with MDE/signing with Access 2003 or 2007.

On Fri, 23 Apr 2010 15:29:01 -0700, Glenn Drayton <Glenn
(E-Mail Removed)> wrote:

Send detailed feedback at connect.microsoft.com.

-Tom.
Microsoft Access MVP


>Starting with Access 2010 beta and now also into the RTM version we have
>found that the digital signing of MDE files is buggy. The signing can be done
>per normal (open the MDE, go F11 to the VBA window and choose Tools/Digital
>Signature). But if you then try to open the MDE after signing you get the
>message:
>
>"Warning: The digital signature has been tampered with..."
>
>This problem does not occur with MDE/signing with Access 2003 or 2007.