I would avoid jpeg if at all possible. It is a very lossy format that can create artifacts which may screw up transfers (things like grey between the traces instead of white). Use something like PNG instead.
I didn't say you would have problems, I said you could. JPEG is a pretty crappy format and I would not trust it with anything that needs to be well defined because it tends to soften edges. I was merely suggesting an alternative.
I just read mine back and it sounds pretty defensive.
Sometimes when printing these things, they turn out weird no matter what format it is in. I had to set my printer to 99% scaling, doing it on the PC made things a little wonky.