When it come to saying what version of Perl we need for our scripts, we've got options, oh, brother, we've got options:
use 5.010;
use 5.010_001;
use 5.10.0;
use v5.10;
use v5.10.0;
All seem to work. perlcritic complains about all but the first two. (It's unfortunate that the v strings seem to have such flaws, since Perl 6 expects you to do use v6; for your Perl 6 scripts...)
So, what should we be doing to indicate that we want to use a particular version of perl?
I just use something like 5.010_001. I've grow weary of dealing with version string problems for something that should be mind-numbingly simple.
Since I mostly deal with build systems, I have the constant struggle of Module::Build's internal version.pm which is out of sync with the version.pm on CPAN. I think that's mostly better now, but I have better things to think about.
The best practice should always be to do the thing that commands the least of your attention, and certainly not take more attention than the value it gives back. In my opinion, v-strings and dotted decimals were a huge distraction with no additional benefit, wasting a lot of valuable programmer time just to get back to the starting point.
I should also note that Perl::Critic has often pushed questionable practices for the higher purpose of reducing the ways that people do things. However, those practices often cause problems, make them un-best. This is one of those cases. A more realistic best practice is to not make Perl::Critic compliance your goal. Use it where it is useful, but in cases like this, don't waste mental time on it.