Wow, I just started developing engineering calculations on mathcad, and I've run into this problem sharing it with other engineers, as well as trying to do some of my work on my home computer! What an EPIC fail for this otherwise nice piece of software. I had envisioned moving away from MSExcel, but this lack of portability is not good at all! After 15 versions, Mathsoft has not corrected this problem? Isn't this a fundamental criteria in software development; portability of files between different computers?
The problem is different display settings on different computers, as Tom wrote earlier.
If you stick with normal size (96 dpi), then the files will display and print the same on different computers. We have fixed this issue for next version, Mathcad Prime 1.0, which is still in development.