Problem while upgrading 15--16 with yum

[DB]

Hi all,

Hope someone can help me (again!!).

I'm trying to upgrade my desktop from F15 to F16 using

yum --releasever=16  distro-sync (with an added --skip-broken)

(same as I did on my laptop without problems) & after several minutes of 
lists of packages to be updated, the system comes to a screeching halt 
with the following messages:

> Error: Protected multilib versions: GConf2-gtk-3.2.0-1.fc16.x86_64 != GConf2-gtk-2.32.3-1.fc15.x86_64
> Error: Protected multilib versions: libsepol-2.1.1-1.fc16.x86_64 != libsepol-2.0.42-2.fc15.x86_64
> Error: Protected multilib versions: GConf2-3.2.0-1.fc16.x86_64 != GConf2-2.32.3-1.fc15.x86_64
>  You could try running: rpm -Va --nofiles --nodigest

I tried the suggested rpm line & tried again, but always the same errors 
appear,  I tried to remove the packages with yum but would have ended up 
erasing the whole system....

Can anyone please suggest a way round my error situation???????


As ever, many thanks in advance!!

Dave