[nailer]

Edit: should be sorted.

Original: working on a standard DPI Mac, but it still looks fine - see http://imgur.com/WRWYzBx. Trying to figure it out now...

[tripzilch]

Do you mean "fine" as in "very fine lines", or "looks fine" as in "looks good"?

Cause that looks like a printer that ran out of ink.

[LeoNatan25]

I'm guessing OS X's font smoothing is more aggressive and makes it look better than Windows'. It also depends on how the font was hinted for Windows, whereas on OS X, the system "knows best" and has its own font smoothing technique.