Adobe Reader X doesn't even try to validate expired user certificate used in digital signature

Verifying a file signed with an expired certificate (timestamped or not) causes Adobe Reader to raise strange CRL parsing error:

Note:

• the CRL is currently valid
• the errors "propagates" also on the OCSP responses
• the file is timestamped before the certificate revocation.
• the error is reproducible everytime and with different signature/CAs: personally I've tried with Frenc, Italian and Spanish signed evidences.

Below the exceprt from the CertificateViewer-->ErrorInformation window

CRL processing error

Issuer: serialNumber=4, cn=Certigna ID, ou=0002 481463081, o=Dhimyotis, c=FR

This update: 20120123110005Z

Next update: 20120124110005Z              

CRL has expired or is not yet valid____________________________________________________________

CRL processing error

Issuer: serialNumber=4, cn=Certigna ID, ou=0002 481463081, o=Dhimyotis, c=FR

This update: 20120123110005Z

Next update: 20120124110005Z

CRL has expired or is not yet valid____________________________________________________________

CRL processing error

Issuer: serialNumber=4, cn=Certigna ID, ou=0002 481463081, o=Dhimyotis, c=FR

This update: 20120123110005Z

Next update: 20120124110005Z

CRL has expired or is not yet valid____________________________________________________________

CRL processing error

Issuer: serialNumber=4, cn=Certigna ID, ou=0002 481463081, o=Dhimyotis, c=FR

This update: 20120123110005Z

Next update: 20120124110005Z

CRL has expired or is not yet valid____________________________________________________________

OCSP response has expired or is not yet valid____________________________________________________________

CRL processing error

Issuer: serialNumber=4, cn=Certigna ID, ou=0002 481463081, o=Dhimyotis, c=FR

This update: 20120123110005Z

Next update: 20120124110005Z

CRL has expired or is not yet valid____________________________________________________________

CRL processing error

Issuer: serialNumber=4, cn=Certigna ID, ou=0002 481463081, o=Dhimyotis, c=FR

This update: 20120123110005Z

Next update: 20120124110005Z

CRL has expired or is not yet valid____________________________________________________________

or, for example

CRL processing error

Issuer: cn=InfoCert Firma Qualificata, ou=Certificatore Accreditato, serialNumber=07945211006, o=INFOCERT SPA, c=IT

This update: 20120305161509Z

Next update: 20120305172400Z

CRL has expired or is not yet valid____________________________________________________________

OCSP response has expired or is not yet valid____________________________________________________________

CRL processing error

Issuer: cn=InfoCert Firma Qualificata, ou=Certificatore Accreditato, serialNumber=07945211006, o=INFOCERT SPA, c=IT

This update: 20120305161509Z

Next update: 20120305172400Z

CRL has expired or is not yet valid____________________________________________________________

CRL processing error

Issuer: cn=InfoCert Firma Qualificata, ou=Certificatore Accreditato, serialNumber=07945211006, o=INFOCERT SPA, c=IT

This update: 20120305161509Z

Next update: 20120305172400Z

CRL has expired or is not yet valid