New Version 3.0.0.4.374.4561 - Available now
ASUS RT-N66U Firmware version 3.0.0.4.374.4561
Security related issues:
-Force changing FTP from anonymous to account mode after firmware upgraded.
- Patched IPv6 user interface from Merlin's build.
UI:
-Fixed IE and Firefox compatibility issues.
- Network map will show notification when newer firmware available.
- Fixed USB tray icon UI bug.
http://www.asus.com/Networking/RTN66U/#support_Download