I used muton's build as following, fresh install, no other versions on Win7:
ufoai-2.3-dev-28338-Debug-pentium3-O1-sse-7z-small-win32.exe
I go to the save screen in the campaign game and I am able to type in a name, but there is no button to confirm the save and it doesn't do anything when I hit enter. I don't know if this is intentional or if I am just doing something wrong.