Your probably better off with the VM firmware tweetiepooh. DD WRT 17990 (12/09/11) build isn't stable, did some strange things. I've now reverted to D Links firmware, may try the VM firmware posted. wireless stability is better.. infact all round stability is better.
Originally Posted by thenry
few issues with the new builds for the 615, be wary of what you put on!
17990 (12/09/11) seems ok stick with it for the latest
the 3 built after that have issues: (thanks to Vaako on DD-WRT)
(12-12-11-r18000) - Works but it seems WAN to LAN is slower than previous builds
(12-14-11-r18007) - No Internet on DIR-615 D1 & D3
(12-20-11-r18024) - No Lan Ports and Semi-Bricked
ignore my advice that 17990 (12/09/11) is stable. The 3 builds after 17990 are deffo bugged though. I don't have a clue what build is stable.