That screen shot is of SoftMaker's TextMaker 2002, which is an excellent word processor that I recommend highly. I'm using the latest build 400 release.
TextMaker is much better than Pocket Word, can work with Microsoft Word .doc files without mangling them in the conversion, and supports many features that Pocket Word doesn't, including check as you type (check as you tap?), tables, styles and graphics.
However, I've seen the problem happen in other applications as well - I got a 'high with a line of garbage underneath' Fitaly in Pocket Internet Explorer earlier, and I have seen it once in Pocket Word. Unfortunately I hadn't got my screen capture program connected up to a hardware button, so I didn't get a screen shot.
David