Update:
I'm using 0.8.2-test1 beta and while the problem is still there, but it seems (to my unscientific ears) to occur less often.
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main warning: resampling stopped after 46094261 usec (drift: 37123)
main warning: buffer is 57161 in advance, triggering downsampling
main warning: output date isn't PTS date, requesting resampling (-40312)
main warning: timing screwed, stopping resampling
main warning: buffer is 97428 in advance, triggering downsampling
main warning: output date isn't PTS date, requesting resampling (-40036)
main warning: audio drift is too big (-120069), clearing out
main warning: timing screwed, stopping resampling
main warning: mixer start isn't output start (-11254)
main warning: buffer is 79671 in advance, triggering downsampling
main warning: output date isn't PTS date, requesting resampling (-64778)
main warning: audio drift is too big (-144766), clearing out
main warning: timing screwed, stopping resampling
main warning: mixer start isn't output start (-11435)
main warning: buffer is 68028 in advance, triggering downsampling
main warning: output date isn't PTS date, requesting resampling (-67490)
main warning: audio drift is too big (-135835), clearing out
main warning: timing screwed, stopping resampling
main warning: mixer start isn't output start (-20105)
main warning: buffer is 67983 in advance, triggering downsampling
main debug: audio output is starving (115807), playing silence
main warning: output date isn't PTS date, requesting resampling (-40152)
main warning: timing screwed, stopping resampling
main warning: buffer is 106217 in advance, triggering downsampling
main warning: audio drift is too big (-126870), clearing out
main warning: timing screwed, stopping resampling
main warning: mixer start isn't output start (-8543)
main warning: audio drift is too big (-126507), clearing out
main debug: audio output is starving (368348), playing silence
main warning: output date isn't PTS date, requesting resampling (-91812)
main warning: buffer is 91813 in advance, triggering downsampling
access_mms warning: detected packet lost (37438 != 37437)
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Keep up the good work, and with any luck 0.8.2 final won't have this problem at all