Rated 5 out of 5 stars

per Tetsuya Tsurugi el des. 6, 2013 ·

I have tb 24.1.1 and donsen't work. It's incompatible or I need configure it? Thanks

This review is for a previous version of the add-on (1.3). 

per Jonathan Kamens (desenvolupador) a des. 6, 2013 ·

Define "doesn't work." It has many bits of functionality; which of them do you have enabled, and are any of them working?
Do you have version 1.3 of the add-on? There are fixes in that version for newer Thunderbird versions.
Are you using a non-standard theme? If so, try disabling the theme and seeing if that makes Enhanced Priority Display start working again.
This is not the best place for support requests since we can't correspond. There's a link to my email address on the add-on page.