Examine and fix Windows not handling multiplication character in Linux builds

[ibboard]

To do things properly, our requirements use "×" (multiplication sign) instead of "x" (letter x) to say "1 × some unit". When built under Mono and run on Linux this works fine. When built under Windows/VS.Net and run on Windows it works fine. When built on our nightly servers (which are Linux) and run under Windows then it shows "??" instead. This is probably an encoding issue, and we need to see what can be done about it.