localhost anton # emerge -up world
These are the packages that would be merged, in order:
Calculating world dependencies... done!
[ebuild U ] dev-db/mysql-5.0.26-r1 [5.0.26]
[ebuild UD] app-arch/tar-1.15.1-r1 [1.15.92-r1]
So remove it? You did stick it there yourself... :P
*** Bug 152490 has been marked as a duplicate of this bug. ***
You don't understand :)
I don't want 1.16 so I masked it.
My current version is 1.15.92-r1
However, portage suggests to downgrade when 1.15.92-r1 isn't masked in package.mask
Of course, because the only available versions are 1.15.1-r1 and 1.16 (which you've masked for yourself).