I've had the same problem ever since I've used PSPad. There seems to be no sure way to reproduce it, it just appears randomly from time to time. Haven't yet seen it with the latest beta (2255).
In build 2240, it frequently happens when you open a file from the history dropdown box. -- <http://forum.pspad.com/read.php?4,38322,38416> PSPad freeware editor http://www.pspad.com
