After inactivity, R6 client hangs until timeout

In OS X 10.2.3, after a period of inactivity, the Notes client hangs on the first attempt to reconnect to the server. This hang lasts a couple of minutes, and finally comes back with a message indicating that the operation didn’t complete in a reasonable about of time. However, when you refresh again, it’s connected (although the auto-complete address feature often doesn’t work).

I noticed that Bryan Newman reported a closely-related issue back in November (“ND6 Client on Mac OSX hanging”), but no one responded. Brian referred to a technote documenting how “a similar bug that can be fixed by adding a preemption_timeout=5 line into the client prefs.” I searched but couldn’t find this.

Can anyone help with this?