After my email provider changed some things, to get TB to work I had to delete and add back my five email accounts (discussed in another thread). All those email accounts now work, but their visual presentation is very different (and worse in my opinion). Before, there was one Inbox, Junk, and Trash, all under Local Folders. Now, there are five (one for each email account) sets of Inbox, Junk, and Trash. They appear above Local Folders which now contains only items put there before my problem started.

I've attached an image of what this visual presentation looks like now.