#1
Is the song in Drop D or standard D tuning? It is quite confusing, as every tab is different.
#3
When I originally learned the song I learned it in drop. But you can play it in D standard, it really doesn't change much.
#5
Hmm thats what I thought. And I just watched him play it and the solo (which is in D minor) uses the frets the E pent. minor usually does, meaning he plays it in standard D.
#6
Play it the way it was meant to be played, standard D. Plus the tone will be more correct, I imagine.

Duh, dah duh dah duh, dah duh dah duh...

*ch ch ch ch ch ch ch ch chhhhhhhhhhhh*