Sound font path in 1.0

The soundfont path in MS 1.0 under Windows has been broken for a long time (see example with the "//" in the path), but ironically the sound always works for me. This specific path is the result of a factory reset but the "//" always gets created. This bug has recently been fixed in the trunk, so I suspect the fix (whatever it was) should be backported to the 1.x branch. I've seen some people complain about sound not working in 1.0, but their issue(s) may be unrelated.

See also:
http://musescore.org/en/node/7460
http://musescore.org/en/node/10614
http://musescore.org/en/node/10710