Noia for TB 17 Rated 5 out of 5 stars

some Themes don't work with the current TB 17 in this case you can try "Titlebar Tabs Cleaner"
https://addons.mozilla.org/en-us/thunderbird/addon/titlebar-cleaner/

This review is for a previous version of the add-on (3.42). 

Thanks for the info Mark.For other users : With Titlebar cleaner, Noia2 theme works with TB 17. Nevertheless, you'll have to adapt inside the xpi file, three install.rdf files to support the TB max version. Put 17.*, it's OK.And of course, you'll have to accept a few visual bugs. I work on an update. Be patient ...