Updated from the package in the FTP site, reset to its factory defaults and configured from the scratch, by hand. A2 hardware. It's showing 1.31NA (never showed this "NA" before. anyway...) and seems to be working fine so far, except for a noticeable rate and signal loss on wireless, which is weird because nothing has been changed (positions, antennas, even channels). inSSIDer is still showing the same signal strenght as before. I've tried disabling b signal but it kept the same behavior.
Has anyone noticed the same? I've just realized that the router has never showed the full speeds it's showed with the original firmware (1.10 ou 1.11, I guess).