[fetchmail] Harmless(?) "Repoll immediately" message even under --silent

I've just installed fetchmail 6.1.0+NLS on Linux 2.2.19-6.2.16 (RedHat 6.2)
My POP3 server identifies itself as MercuryP/NLM v1.48

When I run fetchmail (even fetchmail --silent), it complains:

  fetchmail: Repoll immediately on [username(_at_)servername]

Under --verbose, I get:

  fetchmail: POP3> CAPA
  fetchmail: POP3< -ERR Bad command.
  fetchmail: Bad command.
  fetchmail: Repoll immediately on [username(_at_)servername]
  
so it seems to be related to the fact that the server doesn't support
CAPA. The problem is that I get the "Repoll" message even when running
under --silent, and yet it appears to be part of normal operation and
outside my control (so I would have expected it to be suppressed).

Is this a bug, or have I misunderstood something?

 .robin.