Not sure if this is a bug in KM or Mozilla (M$? Yes)
Copy all of this post into:
<a href="
http://world.altavista.com/tr">Babelfish</a>
... and the 'clip' doesn't refresh the view of the page when 'pasted' as the drop down box section of the screen overwrites the area you need to select.
Really hard to explain - experiment with cut 'n' pasting, you will soon see.
Nick