I originally posted this on MSF, but it got no response, so at the suggestion made in a comment there, I'm reposting it here.
This should be called "up-votes", or something like that, showing a count ("1" in this case) instead of a value.
I'm not sure what should be done with down-votes. Perhaps the tab should say "votes" and show "+X -Y".
As it is it implies that reputation is awarded.
Reputation is awarded on metas, it's just not shown next to your name in the top bar (the rep from the parent site is shown instead) -- but that "reputation" is still a valid measure of your participation in that meta.
I see what you are talking about, but I suspect most meta visitors will quickly understand what is going on and will not really worry about it. I am sure there are many other more important things to fix before this gets to the top of the task list.
The reputation tab is no longer shown on child metas, so this should no longer be an issue.