In fact, HEX 20 or ASCII 32 means common space, and non-breaking space has ASCII code 160, it is present in ASCII table.
As a test you can found some rich text document, for example HTML page, copy from it space, which is for sure nbsp and paste in another rich text document. Then try to replace simple spaces with underscore and see that nbsp was not replaced. Thanks. -- <http://forum.pspad.com/read.php?2,36119,36148> PSPad freeware editor http://www.pspad.com
