I use Q&A on my site from many months, without issues. From the latest upgrade (1.07 version), I have noticed that anonymous users (visitor role) can't view the answers, but only the questions.
I have assigned capabilities to view answers, to visitor role, in settings, as you can see in the first screenshot.
But the logged in users only are able to view answers (second screenshot); the visitor, logged out users, can't see the answers (as you can see in the third screenshot).
The same problem is present in a local fresh installation of wordpress, without any plugin and with the default theme twenty eleven.
Thanks in advance