Native Mode Certificate Selection Criteria Cannot Use Attributes with Spaces

It’s recently come to our attention that if you are using certificate selection criteria with certificate attributes that include spaces, the spaces can be stripped out and so certificate selection for a valid certificate will fail. Certificate selection is required on clients if there is more than one valid certificate with client authentication capability in the local computer certificate store, and you have not configured the option to select any certificate that matches.

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http://blogs.technet.com/wemd_ua_-_sms_writing_team/archive/2008/11/02/native-mode-certificate-selection-criteria-cannot-use-attributes-with-spaces.aspx