@DJG Thanks for finally getting us an answer.
So Intuit: "The rounding differences are well within the IRS built-in tolerances for rounding discrepancies." I.e., the IRS doesn't care about a few hundred dollars. That's great for me, it came out to around $200 less than my 1099-B totals. Not so great for those it's over-reporting gains for, though.
Guess I'll do the attach the 1099-B as a PDF thing so it's accurate--after getting a refund for the desktop edition since they say it can't handle PDF attachments (really, guys?).
At least we can all decide how we want to proceed now.
