You may remember that we publicised the 'emergency' three finger super-hard reset key sequence for the Nokia N8 a while back? This is obviously not really meant for general users, at least not in the N8's case, since some of the underlying Qt enablers are thereafter missing from the device and functionality like the Ovi Store is also rendered inoperable. Hopefully, most of you will never need this emergency sequence in the first place (*#7370# should be enough should the worst ever happen), but if you do find yourself utterly stuck then note 'Leo the Lion's mini-tutorial on how to add the right Qt enablers back in. 

If nothing else, it might save a trip to a Nokia Care Point to get the device reflashed formally.

This is a well known problem for the N8 after you did a hard reset or flash with custom firmware versions through flash software like Phoenix 2010.

What I'm about to tell, that the solution did help me, but might not help you. But, why not give it a try?

(via My Nokia Blog)