Getting postgres connection errors

I am getting these types of errors quite frequently and am wondering
what may be causing them or how to fix them.

PGError: lost synchronization with server: got message type "T",
length 1409286191
PGError: lost synchronization with server: got message type "T",
length 1409286191
PGError: lost synchronization with server: got message type "T",
length 1409286191
PGError: lost synchronization with server: got message type "T",
length 1409286191
PGError: lost synchronization with server: got message type "T",
length 1409286191
PGError: lost synchronization with server: got message type "T",
length 1409286191
PGError: lost synchronization with server: got message type "e",
length 980640103
PGError: lost synchronization with server: got message type "e",
length 980640103
PGError: lost synchronization with server: got message type "e",
length 980640103

They tend to happen after the daemon is running for a while (a day or
two). Needless to say once this happens the daemon is not working
anymore.

Any help in diagnosing and solving this problem would be much appreciated.

This problem started with the recent update to rails. I also think it
may have to do with this statement
ActiveRecord::Base.connection_pool.clear_stale_cached_connections!

The postgres mailing list tells me these errors have to do with
threading in libpq.