Want to explore ? Hitting Shift+? will now show a pop-up window showing popular examples, even if keyboard shortcuts are switched off. Bear in mind this list varies depending on which mode Gmail is at the time--you'll see a different list when composing a mail than you will when browsing your contacts list, for example.

There's now a dedicated Refresh button at the top of the screen that should update the display with new messages. This is useful considering Gmail tends to do odd things like showing your Inbox an unread entry, without actually showing the new message in the list.

Perhaps the most useful new feature is address debugging when you're sending group e-mails. Previously, if you typed a list of addresses in a new e-mail and one had a problem (perhaps you'd typed a space in it), Gmail would alert you to a problem but not provide specifics. Now it will tell you the errant addresses in a dialog box. I'd have liked to have seen something more intuitive, such as highlighting the badly formed addresses, but this is better than nothing.

The tweaks are typical examples of Google's organic approach to improving its software, which contrasts strongly with Microsoft's approach of providing . Of course, updating in this way wouldn't be possible if services like Gmail weren't based in the cloud. And because we all access the software online, Google never has to worry about rolling out changes and the problems that arise, such as different versions on different computers.