WiFi problem with 0.5.1RC2

Anyone else having issues with wifi on 0.5.1RC2?
My wifi USB worked just fine with previous version(s), and with the latest one (0.5.1RC2) it seems there’s something wrong with drivers - the wifi isn’t activated (no blinking light on the USB card), and there is no network activity using wifi. Ethernet works fine…
I’ve tried DHCP address assignment, and static IP (which also works fine with previous versions), but to no avail…

I suspect incorrect driver/module is being loaded, although lsmod shows “rt2800usb”, which is also used by previous versions…