Even as I suggested it, I was wondering how badly it would break the existing design where there is just one kind of thumb.
Often it is easy to suggest something that sounds easy to implement ... but is not!
And having "the thumb" mean one thing everywhere else in the site, but mean something different here, would probably be Bad Design. Maybe, instead of a thumb, an eye?
Or something suggesting "typical and classic" ... archetypal ... I'm not sure what that would be.
