Rated 3 out of 5 stars

Really nice, when it worked. However despite saying the issues are fixed, 1.0.7 still does not function (won't check, no new mail showen, etc.) on both Mac and PC.

This review is for a previous version of the add-on (1.0.7.1-signed.1-signed). 

Try the pending 1.0.7.1 update. If it doesn't work, click the "alternate checking method" in the options. If it still doesn't work. Go to yahoo.com and sign out, then right click on the page and choose "View Page Info" and then go to the Security tab and click view cookies. Click "Remove All Cookies".