I feel that this is caused by the hack that steemit.inc did to "fix" the problem of RCs when they introduced that hardfork.

They basically multiplied everyone's RCs. Which works just fine accept for the very bottom.

I feel this because it is the exact same problem new accounts were having back then.

So.... something like, you need 93 million, and you really only have 33 million (not billion) for this single transaction.