--- cvsroot/AnyEvent-MP/MP.pm	2009/08/08 21:56:29	1.41
+++ cvsroot/AnyEvent-MP/MP.pm	2009/08/09 00:41:49	1.42
@@ -503,8 +503,17 @@
 
 =item $guard = mon $port, $rcvport, @msg
 
-Monitor the given port and do something when the port is killed, and
-optionally return a guard that can be used to stop monitoring again.
+Monitor the given port and do something when the port is killed or
+messages to it were lost, and optionally return a guard that can be used
+to stop monitoring again.
+
+C<mon> effectively guarantees that, in the absence of hardware failures,
+that after starting the monitor, either all messages sent to the port
+will arrive, or the monitoring action will be invoked after possible
+message loss has been detected. No messages will be lost "in between"
+(after the first lost message no further messages will be received by the
+port). After the monitoring action was invoked, further messages might get
+delivered again.
 
 In the first form (callback), the callback is simply called with any
 number of C<@reason> elements (no @reason means that the port was deleted