A red circle sticks to the icon if there is un-read in the specified mailbox.
What's new in this version:
- Modify it to make an message preview window for the new case if you are here under the condition which the window of Mail.app is not in when you select "Show Mail.app" from the menu.
- But, you must check "Enable access for assistive devices" in the bottom of "in the Universal Access System Preference pane" to make this function available.
- Correct the problem that a program may stop.