Very important! Rated 5 out of 5 stars

Great, most important Add-on. We are eagerly waiting for a version for Thunderbird 5.0 (and yes, now that we felt the importance of QuickFolders, we WILL donate).

This review is for a previous version of the add-on (2.7). 

Compatibility version is WIP

Thanks! yes, a new version is in the pipeline, just waiting for my translators, with some additional Postbox bug fixes.. Hopefully I will be able to release a version by this weekend - including review time it should be ready for use by the end of next week. In the meantime, you can use this prerelease version:

http://downloads.mozdev.org/quickfolders/QuickFolders-tb-pb-sm-2.7.1pre4.xpi

More prereleases will be made available on http://downloads.mozdev.org/quickfolders/ once I am nearing completion.