It looks like it is one of netgear's worst, here seems to be a big heat problem which might contribute to your issue.
Someone on another site wrote this:
"Did run very hot and have DHCP issues and drops when I initially fired it up. I had it flat like all the other stuff. But.. I went online to Netgear forums and the consensus was to at any cost, stand it on end. It seems awkward when you have some wired connections, but it runs very stable now."
Hope this will help