The biggest problem people moan about is multi-select. It is not intuitive to use a key modifier like Shift or Control to select multiple messages. In addition, in IE7 when you control-click it opens the message in another tab, so if you control-click 10 messages to delete them, you now also have 10 tabs to close.

Is there something I am missing on this problem? Is there a setting where I can enable an old school checkbox column for people to use in multi-select?