The intro is played by more than 1 guitar.  The best tab listed on this site has the 
detuned a half-step.  It's hard to play a set with a detuned guitar.  I guess if you have 
than 1 guitar, it's not prob, but if you're like me, you're it.

Intro is like this:

intro
e|-----------2---------------2---------------2---------------2-------------------|
B|-----0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0-------------|
G|---1---1-------1-------1-------1-------1-------1-------1-------1---------------|
D|-------------------1---------------2---------------2---------------------------|
A|-------------------------------------------------------------------------------|
E|-------------------------------------------------------------------------------|

To play this use your 1st finger on the G string, 3rd finger on the E string, 2nd finger 
the G string.

The chords used throughout most of the song are F#, G#m, E2

Other tabs that show the lyrics and use these chords are correct.