Thompson TG585 reports DNS issue

[#1]

Hi folks, when I go the my router "page" and run the connection test under:
"Home > Broadband Connection > Internet Services > Connectivity Check"
It reports that the DNS is down, but I can access websites on two difference PCs through the connection. Why am I seeing this and how does it diagnose this? I can run nslookup queries ok using either server

Test Results
Test Succeeded	DSL
Test Succeeded	ATM
Test Succeeded	PPP
Test Succeeded	IP
Test Failed	Internet
	Enabled/OKConnectivity to Gateway (195.166.130.71)
	Disabled/Not OKConnectivity to DNS Server 1 (212.159.6.10)
	Disabled/Not OKConnectivity to DNS Server 2 (212.159.6.9)

[#2]

It's a known router reporting glitch - ignore it

[#3]

Ok fair enough 
Do these devices need regular power cycles every week or so? Im asking as Its a new connection so there may have been some line tuning going on but I noticed the connection seemed to be stalled the other day, every webpage request was timing out and no responses to pings / nslookups etc. The only thing that cleared it was a power cycle of the device.