I've noticed that my 7800N has developed a brown spot on it's casing that appears to have been caused by something on the main circuit board generating a lot of heat. I'm wondering if any other 7800N owners have encountered anything similar? The router works fine with no issues so far.
Great router and overheating is well reported. My wifi stopped working completely after a long facetime chat over wifi! It seemed completely broken and the wifi config option was gone from the config pages. I put an icepack on top and after a while it was working again! Worked completely fine after that too.
There is a known problem with some of the earlier models where you switch it off (e.g. going on holiday) and when you switch it back on wifi no longer works. Let's just say that Billion support is superb.