not sure which region mine was, I bought it in Singapore.
D-link Singapore site don't have it listed on their support page.
It also not sold in pc store anywhere in the country beyond pc trade show where I bought it from.
Check online now for latest firmware version menu, direct me to wrpd.dlink.com.tw for download of latest 1.07 firmware, file named: DIR850L_FW107WWb01_d6la.bin
Actual date on the firmware is: 06/21/2013 10:27:00
shown as version 1.07.
No major issues so far, will monitor for a few days, previously 5GHz band will stop working after sometime.