line gap

Different line gap between styles of the same font



I have a problem with the line gap of my font when using it on windows 7 with Wordpad (no problem on open office and on my mac).

I made a font family with 4 styles (regular, italic, bold and bold italic) and when I use it with Wordpad, I ended up with unconsistent linegap. Italic, bold & bold italic have the same line gap but regular has a larger one.