SquirrelMail

If you use html based address book, priority and receipt information is not
preserved when you return to message compose window.

How to reproduce:
* Start writing a message
* Change default priority and receipt values
* Select Addresses button
* return to address book
* priority and receipts goes back to default

p.s In 1.5.2-dev you can't return to compose window, if address book is
empty.