Have you tried to increase the line spacing? Config dialog > Direct Edit > Special Settings section > ExtraLineSpacing=n. Or try to switch to another font. Personally, I'm using Bitstream Vera Sans Mono recently, and I'm quite happy with it.
-- <http://forum.pspad.com/read.php?4,30034,30037> PSPad freeware editor http://www.pspad.com
