I just updated my Lumia 520 found out that the OS version same as pfd & firmware version is equal to cyan firmware no. So no firmware update yet !
That shows denim even when this update was not available.. or u can say when i was pfd... i downgraded specially for denim cz it was showing update not available when i was ob pfd.. i thought like cyan same issue i downgraded and than Critical update popped in .. and i updated... than it showed cyan.. i updated extras + info app got lumia denim written there.... still no firmware no. change nor... lumia camera v5could you upload a screen shot !! under settings ABOUT and extra+info