Stickshift Software has released Mailsmith 2.3.1, which fixes a bug that prevented Space-bar navigation from working properly, plugs some memory leaks, and avoids checking the installed version of SpamSieve to avoid problems with newer versions of SpamSieve. (Free, 25 MB)
Move to Top Shortcut in iPhone
On an iPhone, flicking all the way back up to the top of a long Web page can be a real drag. Instead, a single tap on the status bar moves you to the top of a page. (The status bar is where the clock is.) This tip also works in other apps, like Mail, Contacts, etc.