I just generated a Banking > Cash Flow Report and included investment accounts. In the Income section, there's an entry for _UnrlzdGains that is positive (personally, I don't see why unrealized gains are in a cash flow report — unrealized gains don't generate cash flow). If I drill down on the amount to see where it's coming from, I get a blank report.
For some reason, the date range is Custom instead of whatever the source Cash Flow Report was set to. Also, if I Customize the report and look at the Advanced tab, the box to Include Unrealized Gains is unchecked (which is odd for a sub-report that's supposed to be showing unrealized gains). So, that explains why the report is blank. However, if I check that box (don't do it with a large report date range — it locked up with Include All Dates set), the report that comes up doesn't give the same unrealized gains total that the original Cash Flow Report does. It's WAAAAAY different.
Anyone have any idea what's going on with those Unrealized Gains in the Cash Flow report?