Contact Create constraint violation when using Name Prefix

I ran into this before and commented on a different thread - I think I may have tracked the issue down.

I generally add several name prefixes (e.g., Prof., Rev., Hon.) - it's possible that the Webform integration doesn't like that. I get the following in watchdog and the contact isn't created in Civi, nor does the Contact name appear in the webform submission.

This error is unpredictable and may be PHP-version related; in any event, this seems to (maddeningly) appear only on certain sites and not others.

The CiviCRM "contact create" API returned the error: "DB Error: constraint violation" when called by function "preSave" on line 143 of wf_crm_webform_postprocess.inc with parameters: "Array ( [contact_type] => Individual [contact_sub_type] => Array ( ) [webform_label] => Contact 1 [prefix_id] => 1 [first_name] => Test [last_name] => Testing [preferred_communication_method] => Array ( [0] => ) [source] => Join Us! [check_permissions] => [version] => 3 ) "

If I remove the Name Prefix field form the webform (or if there's a submission value of - None -), everything goes as expected. Perhaps this will be helpful should someone else run into the problem. Thanks!