Can't seem to find the overlay options for mumble 1.3. Did an upgrade to the 64 bit client from 32 of the older version(s)
The x64 build does not yet have a working overlay implementation. It has simply not yet been ported.
For now, if you require an overlay, I'd advise you to continue to use the 32-bit builds.
We plan to have 64-bit overlay support in the final 1.3 release.
Does that apply to what it overlays to? (Ie. 64bit vs 32bit World of Warcraft)
We don't have a 64-bit overlay at all right now, so 64-bit WoW wouldn't work, unfortunately.