Missing e v2.6.10
There are a handful of fixes for things that broke or started looking odd today with Tumblr's dashboard style changes:
Style of added sidebar elements
Incorrect queued post counts for added sidebar
Size of added new post buttons on secondary dashboard pages
Updating
If you want the new version immediately, DO NOT uninstall and reinstall Missing e, instead, read the instructions on how to update:
Instructions on how to update
Note for Firefox users: Until the new version of the extension is reviewed by the Mozilla Add-Ons site, you can update just by installing the new version over top of your existing one from the versions page. If version 2.6.10 or higher does not appear in the list, you can wait until later, or use this direct link to install.