Having this same issue with Win 8.1 update. I turn off word-wrap, it's fine.
@pspad, your trick to turn off highlighting solved the problem, but highlighting is one of the best features of your app!! haha. Would love to have this fixed, will help any way I can. -- <http://forum.pspad.com/read.php?2,62210,62339> PSPad freeware editor http://www.pspad.com
