UPDATE:
The ASIC's usually return a nonce if at least the first 32 bits of the found hash are 0 (I think this is called a Work Unit).
But something doesn't fit with 4.10.0 as it finds only a few nonces (ie. the "Proof" lines printed).
I'm testing this on AntMiner S3. Or is the definition of such a WU differrent under AntMiner S3?

Dear author, can you please comment on this important issue as it could be a big bug affecting many people, thx.