Handler disconnect vs. block

[Jeffrey Barish <jeff_barish earthlink net>]

Is there a reason to block/unblock a handler rather than disconnect/connect
it? Is the overhead for block/unblock significantly lower?

One thing I don't like about block/unblock is that GTK issues a warning when
you try to unblock a handler that is not blocked, but there is no way to
ask first whether the handler is currently blocked.  disconnect/connect
offers the handler_is_connected query.
-- 
Jeffrey Barish