Not having any problems anymore here on 2.0b4.. YMMV
EDIT: an addition.. not having any problems.. BUT i have a "watchdog" script running against blocking check_snmp threads which sometimes occured... search for "nagios hanging" in the forum for more info...
Keep on stable if you want it stable
And the latest devel is 2.0b6
Edited Thu Dec 01 2005, 09:22AM ]