emerge - u world (error)

[m21att1]

I'm getting an error when trying to run any varation of emerge world. I got the following message:

!!! Error: the <=x11-themes/gnome-themes-2.8.2 package conflicts with another package.
!!! both can't be installed on the same system together.
!!! Please use 'emerge --pretend' to determine blockers.


So then I run this to unmerge the block:

emerge -C x11-themes/gnome-themes-2.8.2

and it doesn't work and I get this:
--- Couldn't find x11-themes/gnome-themes-2.8.2 to unmerge.

>>> unmerge: No packages selected for removal.


Am I doing something wrong?

[AndrewB]

Yes, it does not mean that it conflicts with itself, it means with another package, give us the full output

[m21att1]

emerge -pu world

These are the packages that I would merge, in order:

Calculating world dependencies ...done!
[blocks B ] <=x11-themes/gnome-themes-2.8.2 (is blocking x11-themes/gtk-engines-2.6.7)


That is the only block I get.

[m21att1]

I think I fixed it, I did this:

emerge -C gnome-themes app-admin

then ran emerge -up world and it had no blocks.

Thanks!