It seems that my router has rebooted itself twice over the last 30 hours.

RouterStats shows the margins dropping to zero and all three Up Time counters (WAN, LAN and WLAN) on the router are reset to zero. If I simulate a WAN line drop by pulling the ADSL cable out only the WAN counter is reset so it looks to me like the router has rebooted.

In both cases the network load was pretty low - World of Warcraft, some browsers over the WLAN and browsing on the LAN.

Some info :

Standard Sky router/firmware
uPnP = off
Respond to Ping on Internet WAN Port = disabled
Connection Speed 15323 kbps 766 kbps
Line Attenuation 21.5 db 12.0 db
Noise Margin 12.1 db 12.1 db

Any thoughts what could be causing this or is it a known "feature" of the DG834GT ?