Please note there seems to be 2 distinct blockchains out there. I was mining blocks in the 5000 block region whilst others were mining blocks in the 7000 block region. I've since recompiled it with the checkpoints that have been added at blocks 2500 and 5000 in the most recent git pushes and I now appear to be on the correct blockchain. I lost the few tiny morsals I'd managed to pick up though.
I'd suggest downloading again. The link is the same, I've merely updated the file to add these 2 checkpoints to make sure you're definitely mining on the correct blockchain.
Blocks: 7915... this should be right ?