Well I went & listened on my neighbors new computer, & it sounds exactly the same as on mine.. When it hits the G chord on most the bass is non existent, on the other chords it is there but at times very faint on some notes.
I could understand if it was just my computer, but what I do with the track now is render to individual wave files mono, & import these wave files into my Daw recorder, where I have complete control of each instrument & it's volume, & I get the same results there too.. hmmm, sure baffling, but PG support said they will fix it in a patch in the near future..