Thank you for your prompt answer FurryNutz, it means a lot to me and I'm sure to every Dlink user...
Day two, my router is still stable with a few hiccups on my phone line which kept dropping during calls. I don't see why, the PAP adapter is a basic one, worked fine with all old routers, not too demanding in terms of bandwidth. But let me first answer your questions.
My DIR-835 router's sticker says ver. A1, firmware 1.00 , in my admin panel ver. A1 firmware 1.01
I live 50 km North from downtown Toronto, I have a 24Mbps/1Mbps cable connection provided by Teksavvy via Rogers cable.
I have a main computer connected through a cable into the router, a wirellessly connected laptop and two other older computers using wireless dongles. One I use with my TV and that is connecting through a 450Mbps Trendnet wireless adapter on 5Ghz for higher speed and less interference, all others use the 2.4 GHz, N and G connections. I have a Wii and some other TV STBoxes that connect wirellessly, a DS lite which I haven't tested yet.
I am not using the true Gigabit LAN as of yet, no such net adapter.
One of the most important, my voip PAP adapter plugged into the router, using a slow Ethernet connection 10Mbps only.
My internet modem, a Motorola SB5101 with no router, I checked the WAN settings in my Dlink web interface and it's showing a WAN address, not a local address so that's fine, no need to bridge.
I'll tell you what I tried and how it went:
Yesterday QoS engine was disabled, I had to turn it on after the call drops, so in advanced Qos Engine I enabled Traffic shaping so I can enable Qos (grayed out if Traffic shaping unchecked), enabled automatic classiffication and dynamic fragmentation), I am now assessing the results
I don't think I have a Gamefuel option or I haven't enabled any.
Turned off advanced DNS after trying it yesterday with no noticeable results.
DNS relay is on, haven't changed it.
Set up DHCP reserved IP addresses for all devices ON the router.
Ensured devices are set to auto obtain an IP address except an IP camera which I set up on static IP to a value higher than other's range.
Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall.
Enabled uPnP and Multi-cast Streaming under Advanced/Networking for both IPv4 and 6.
Wireless modes I'm using under Setup/Wireless/Manual :
mixed G and N on 2.4Ghz and single mode N on 5Ghz
Security mode is WPA-Personal TPIK and AEG, I think it selects automatically
Lots of house phones 5GHZ?
Other WiFi routers in the area, yes, a few, I used indicated software and switch channels to least busy ranges for 2.4 GHz, channel 4 and it seems I'm the only one using 5 GHZ.
I don't seem to be able to turn off Short GI and Extra Wireless Protection, after unchecking, saving and rebooting next time I open the interface they come up as checked and if I click save it says nothing has changed, do I still want to save?
Conclusion on day two, connections seem to be more stable except the dropped calls and weak signal each foot away from the router, however I am still watching it and I really like the connectivity with the Trendnet dongle, huge difference watching movies online.
So it seems I'm on my way to being a happy Dlink DIR-835 owner, I'll keep you posted...