Ideas:
Add 'translate.google.com' support. (I think you just need a Code Snippit in the body section.) From
https://bitcointalk.org/index.php?topic=266678.0Make it so the 'Reset BT++ password' is on the settings page
Make it optional to hide the 'List of PMs' button, or put it only on the PMs page.
Make it so all BT++ buttons are on the same line, separated by dividers.
Make the MtGox button Hide-able (in the BT++ settings)
Make the price ticker be able to use BTC-E (in the BT++ settings)
I will add more when I see/think of them. Great job!
Here is an error with an address formatting: