I was trying to flash the zip file itself, instead of unzipping it, and flashing the bin file inside. After realizing it, the flashing worked well. I might suggest adding this little piece of...

I am also currently on 0.6.0 1.10 v0021.0 Build 141215 Rel.41342n and I tried downloading the newest firmware from http://uk.tp-link.com/download/TD-W9980_V1.html#Firmware and failed flashing. I keep...