The other tab had the right idea but if you listen closely the bass is actually tuned down a half-step, 
so the note on the A string is also moved down to keep the interval consistant.

Main Riff
G    ----------------------------------------------------------
D    -----------------------------------------------------------
A    ----------3-3-3-3---------------------------------------
E b 0-0-0-0-----------4-4-4-4-5-5-5555----------------

Pre-Chorus
G    ---------------------------------------------------------
D    ---------------------------------------------------------
A    --------------------------------3-------1---1-1-1111
E b 0-0-0-0-4-4-4-4-5-5-5-5---------------------------

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