@forkineye Good point about the synchronous nature of network LED programs. However, broadcast packets such as ARP can arrive at any time including during LED updates.
I ran into a problem doing MIDI over multicast UDP. If any WiFi device such a phone goes into WiFi power save, all WiFi devices connected to that router experienced multicast packet buffering delays and/or packet loss. I used a dedicated WiFi router for the MIDI multicast project to avoid this problem. For more details, http://goo.gl/TLDjf5. In the case of network LED programs, erratic multicast packet intervals will result in packets arriving during LED updates which might explain the WDT crashes.