Total fees for a block can go negative

[icook]

This is likely because floating point use at some point from GBT.

[ericecook]

Details on how to replicate this?

[icook]

Bleh, these are the worst. If I remember right the result was that the blocks total fees would come out to "-0.00000001" or something like that. The correct handling for it would be to switch all variable usage to decimals.

Replication is going to be really tough on a testnet... Writing a test case might replicate, but that would require setting up a testing infrastructure.