I just installed 0.6.5. It works fine so far. One thing, which seems a bit strange to me. If you add a new position you will have one transaction shown (0 shares @ 0 price). If you delete this transaction, your position will be deleted also. I'm not sure, if it is supposed to work this way.
And btw. the issue is still present, that you HAVE TO insert dots in fractional numbers, which is not possible using german keyboard layout (there is a comma only).