<P>A patch for MercuryP v4.51 is now available at <A href="http://community.pmail.com/files/folders/patches/entry2517.aspx">http://community.pmail.com/files/folders/patches/entry2517.aspx</A>.</P> <P>The patch addresses the UIDL response to issue a NUL list instead of issuing an error when a maildrop is empty. The RFC regarding this response is vague, however the previous error response from Mercury when the maildrop is empty causes some PDA POP3 implementations to fail.</P>