[CentOS] Access denied false positive

Hi there --

One of our servers is running the 5.3 32-bit release. When a user logs into the
system via an SSH terminal connection,
he first sees an "Access denied" message, and then gets a password prompt. He is
able to enter the password, and 
log into the system without issue. It appears the error message is a false
positive.

A check of the messages and secure log files did not show anything apparent.
What would cause this message to 
occur? 


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