F16 = very good!

[Cristian Sava]

Hi all,

I tried to see how would be F15_x32 to F16_x64_RC4 upgrade. I expected
to fail but it would be nice for average user to see a warning, an
explanation.
He does not know why it has failed. Warn him: x32 cannot be upgraded to
x64.

All was ok on testing F16_x64_RC4 on virtual machine (qemu) and on Intel
I5 760 and AMD 3500+ (old sk939).

Congratulations for all of you. Very well done!

C. Sava