@VelvetLeaf

Just downloaded all three and checked their size and SHA-1:
yacoin-qt-2013-05-08.zip (uploaded during YACoin launch) (8,956,974 bytes)
SHA-1:   19b609e227944287a2c96cfbda79c3bb7459ef5c

yacoin-qt-2013-05-09.zip (updated binary) (8,957,000 bytes)
SHA-1:   b5886f224afed6a5705e080494d03f1789d3dc51

cpuminer-scrypt-jane-win32.zip (cpuminer-scrypt-jane-win32.zip)
SHA-1:   9acacfbb7c5c0861b3b2147d96c9dde35d12b0ae

I would have though it a standard thing for anyone making claims etc. to at least pin point where they got their EXE, its size and checksum. Otherwise everything is a bit hearsay.