error when selecting from sys.sysusers

[Thomas]

Hi,

when issuing a
SELECT username, lastmodified FROM sys.sysusers;
the statement returns a resultset as expected

when issuing a
SELECT username, lastmodified FROM sys.sysusers WHERE USERNAME = CURRENT_USER;
an error is returned:
Error: No one can view the 'SYSUSERS'.'PASSWORD' column.
SQLState:  4251E
ErrorCode: -1

But I am not trying to select the password column!?

Thanks
Thomas