Samba 4 `wbinfo` missing on CentOS

I've just spent an incredible amount of time similarly debugging my server and have come down to the realization that the share and the directory being shared cannot have the same name.

I have no idea why. I hope someone else stumbles across this earlier in their process than I did.

If you follow the FAQ link from JasonAzze, you will see there is a "map to guest" line which is also required, so you need both of these lines:

security = user
map to guest = Bad Password

I had the same problem as the OP, and I have tested that this solution works on Fedora 18