I have one, but just changed jobs so it's boxed up at the moment. I'll see if I can dig it out and give you a definite answer. I boxed it up very soon after getting my MS Pro 256. This would be with the FAT formatting trick rather than the stick's out-of-the-box formatting.
I tried my MS Pro 256 in the Dazzle 6-in-1 and it works great on my WinXP Pro system. I purchased the reader last December so it's not brand new.