Server.log() doesn't display in the log

I am unable to log anything by using server.log() - am I missing something a bit obvious or is this a bug?

Something as simple as:

server.log("impee id: " + hardware.getimpeeid()); server.log("imp mac address: " + imp.getmacaddress());

Shows nothing.

Do you have anything at all in your log window? What browser are you using?

Nothing at all - it is completely blank, I am using Safari 5.1.7 (7534.57.7).

When I use Firefox it displays correctly. I will use Firefox for now, thanks.