My MBC account address shows all the coins still in it, no transfers out.  Hopefully this means that 100% of them will be available to me and there will not be some BS about losing part of mine to compensate someone else.

For this scam to work, your block must get orphaned.
It's a possibility still that your block would get picked up by the next miner/pool who solves a block, in which case, your attack didn't work, but you got the 50 btc.

Worst case scenario, MyBitcoin picks up the other block before you announce yours. In which case, you only lost time and electric.
I'd say a pretty good investment for a scammer with a few thousand btc they'd like to double.

I can't believe that this wasn't foreseen. Bitcoin transactions can be reversed, it happens. It's absolutely irresponsible to not reconcile the block chain against your accounting backend every so many blocks.
Also, simply delaying larger deposits for more confirms would mitigate this.

If you're creating an orphaned block then you wouldn't get the 50btc... so your whole reward would be the stolen coins.
[/quote]
For this scam to work, your block must get orphaned.
It's a possibility still that your block would get picked up by the next miner/pool who solves a block, in which case, your attack didn't work, but you got the 50 btc.
[/quote]

There is actually a simple way to still keep the 50btc - you just need to pay it to the mybitcoin depodit address that your other funds are being sent too.. then, assuming mybitcoin accepts it, you get to keep the 50BTC also.

If anyone -or me- is going to put a lot of time and effort into catching that guy, it better be rewarding.
Does anyone have Tom Williams' email address or something? i am pretty sure their server has a lead

One can now claim 49% of the funds, it seems: https://mybitcoin.com

I claimed and received 49% of my 0.3 BTC

Millionaires already thought of that, and countered it by having the government make them officially not liable for the scams they start, provided the scams are not proven to be deliberate scams and provided they get away with the scam and maybe a few other provisions.

What it amounts to is, any deliberate scam with both malice aforethought and enough up front capital to afford it will have some cool logo or notation or afficxation or prefix or suffix along the lines of "LLC" (Limited Liability Corporation), "LTD" (LimiTeD liability corporation), etc (some German acronym, etc etc, maybe various tiny states established purely for the purpose of running an offshore scams industry might even allow these warning labels to be left off, or use a warning label many people in the world have not yet learned to see as a red flag aka warning label, but basically they are all red flags warning you of a government-approved scam in progress or the intent to escape liability for anything that might go wrong can go wrong or is intended to go wrong, subject some provisikons maybe if you are lucky.

-MarkM- (Kids are responsible to parents; politicians are officially irresponsible, specifically not liable for consequences of laws they pass...)