I'm not sure that most (new) users know how to properly use the vote and accept icons that appear in answers. I know that I didn't for quite some time.

I'd like to propose a minor change in the vote and accept icons...

     ^       or        ^        or      vote ^
     0              vote=0                   0
     v                 v                vote v
    vote

and

    checkmark icon (as it is now)
    Accept