Workflow Notification Mailer stopped working

Hi,

In our dev instance I have noticed that WFNM is down with status unavailable, with following entries in the log.

10/17/12 6:49:02 AM] [main] Starting GSF service with concurrent process id = 27421.
[10/17/12 6:49:02 AM] [main] Initialization Parameters: SVC_WRITE_DIAG_TO_GSM_LOG=Y:SVC_CONTAINER_LOOP_SLEEP=10:SVC_CONTAINER_READ_TIMEOUT=10:SVC_CONTAINER_LOG_LEVEL=4:SVC_COMP_MONITOR_LOOP_SLEEP=60:SVC_COMP_MONITOR_ONDEMAND_FREQ=300:SVC_COMP_MAX_ERROR_COUNT=10:SVC_PROXY_SET=NONE:SVC_PROXY_HOST=NONE:SVC_PROXY_PORT=NONE
[10/17/12 6:49:02 AM] [EXCEPTION] [main] java.lang.NumberFormatException: For input string: "SVC_CONTAINER_LOOP_SLEEP=10"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)