@alzhao, when you said that it works on some systems but not on another I had a feeling that MTU is to be blame.
And I was right.
I run Linux but the WebUI was not working for me. The default MTU for my NIC was 1500. After running ‘ifconfig eth0 mtu 900’ to reduce the MTU, the update panel worked!
Please add it to some sort of documentation, that reducing MTU makes the panel working.
Also, could you please aid me with instruction how to restore NOR flash? I suppose I need dd and write to some /dev/mtd* devices the right parts of the image (kernel, initramfs etc).