or those who may want to go back to TP-Link on WR841 v8 without webrevert file, here is the solution (I've just tested it succesfully on my own WR841n V8 ):
1. Download WinSCP and Putty (if you are using Windows machine).
2. Enable SSH and Telnet on DD-wrt.
3. Connect PC with router with LAN cable.
4. Download orig firmware from TP-LINK, extract and change name for more convinient for example: tplink.bin
5. Connect with WinSCP with SCP file protocol to router.
6. Transfer tplink.bin from PC to /tmp directory on router.
7. Close WinSCP, run Putty and connect to router with Telnet type connection.
8. While logged on router type the following command
mtd -r write /tmp/tplink.bin linux
and hit enter.
Now wait for a while. The Putty will close by itself, now observe diodes on router. They will eventually blink once all together, and this will be sing that router just rebooted.
Done, just go web browser and open 192.168.0.1.
Voila' TP-Link is back Smile
Why so many people want to revert to stock ? Is it not a good dd wrt port for the v8 ?
Maybe because DD-WRT is more complicated to setup.
As for me, I used Gargoyle (few clicks and WiFi client bridge is set), while in DD-WRT took me at least 30 min to figure out why WiFi cannot connect to AP (Antenna gain option was set to 0 by default).
At least on my WR841N v.8.3.
So I can understand those who like to revert, just because I'm jumping around between Openwrt, Gargoyle, DD-WRT just to find the best and easy to use firmware for my purposes (WDS or Client Bridged).