recommended restart-wrapper for freeradius

hi - we're having the freeradius 1.0.2 daemon dying occasionally for mysterious reasons - we're still investuigating the cause. however - when it dies the radiusd.pid file is not removed. this causes problems for most restart-wrappers ... running in the foreground in an infinite loop is also not ideal as this means the daemon doesn't run in threaded mode. can anyone recommend a good way to monitor/restart the daemon. tariq