Dates not returning null

Really you should avoid pulling stuff directly from the database as the schema changes between even minor versions. If the information is not available in the standard API the better approach is to hook the presence or logon events in a plugin and store the extra data either in extended attributes or a custom table.  We have samples in our common code on how to do this.

Really you should avoid pulling stuff directly from the database as the schema changes between even minor versions. If the information is not available in the standard API the better approach is to hook the presence or logon events in a plugin and store the extra data either in extended attributes or a custom table.  We have samples in our common code on how to do this.

Not pulling anything directly from the database. Using the API: $core_v2_user

ah apologies I miss understood, sounds like something changed in the code.

$user.LastVisitedDate > '0001-1-1 00:00:00.000' won't work as you are doing a less than comparison on a string.  Have you tried 

$user.LastVisitedDate != '0001-1-1 00:00:00.000' 

or

$user.LastVisitedDate > $core_v2_utility.ParseDate("1", "1","1")

I recommend Robert Nash's second work-around. I've also logged this as a bug: