When editing, I use Ctrl+(Shift+)Left/Right a lot to shuffle around words in sentences I'm typing.
I've just downloaded FeedReader 3.12, though it's nice that you can just navigate to the 'add comment' page on blog feeds, I regret that FeedReader has mapped the Ctrl+(Shift+)Left/Right-arrow combinations to the Back/Forward of the browser history. (Normally Alt+Left/Right is already mapped by IE, I think)