Hi all,
I have a unit with A4 revision, flashed with 1.22B05(I'd rather use my old setup than going to 1.3x)
Everything seems to be as speedy as my old setup (DI-604 + FON router with DD-WRT)
I set up port forwarding, NO dns relay, QoS set to have BT on priority 250 and manual input of upload speed.
Firewall set to address/port restricted for both UDP/TCP.
WISH, securespot off
Wireless - WPA/AES, 40MHz, G/N mode.
Whenever I try to BT with max 100 connection, my HTTP will pretty much halt.
I've never had this type of problem with a $20 d-link router before.
Of course web browsing will slow down, but it shouldn't take over 2 mins to begin loading a website.
So I thought...let's try something else.
Turned off SPI, QoS. Everything I can think of.
Changed max connections down to 30.
Still the same thing.
I changed back to my old setup and everything is fine again with 100 connections.
What is wrong with this router?

It's over $100 after tax and can't do as much as older gen network equipments out there.