It doesn't matter?! The score you get for playing the internet is my favorite contribution of reddit to social site design. Things just haven't been as much fun ever since slashdot got rid of numerical karma scores.
I just upmodded this post and your karma went up by a point. But I did just release a new version, so if anyone notices a bug, let me know.
I definitely noticed that too.
Karma definitely matters. Hey- at least yours was moving.
You need to kill more boars to get to the next level, then you can wear plate mail and get your mount. (World of Warcraft) ;)