This is a screenshot of what I get.https://support.cdn.mozilla.net/media/uploads/images/2014-08-23-20-42-11-911af7.png

do you have any customizations in a userChrome.CSS file?

nothing that I know of. TB was working fine one day then the next it did this.

The only thing I can think of is a theme. restart with add-ons disabled from the help menu and see if your list returns. That disables themes as well as add-ons.

I have tried all of the re-start with add-ons disabled and re-start in safe mode and nothing seems to work. I am really atg a loss as to what to do. :(

lets try forcing the issue.

It is the fact that is is only a single pane in the three pane view that has me. If nothing displayed then I would be happier.

open your profile folder by going to the troubleshooting information on the help menu and clicking the show folder button create a new folder called chrome open notepad and insert

treechildren:-moz-tree-cell-text(read)
{

color: #D50000 !important
} 

Save the file in the new chrome folder as userChrome.css

That forces read mail to be a rather ugly red color. I am looking for answers, perhaps if this also does not work we need to look as something like corrupt font files.

I used the mozbackup program and after several tries I finally got everything back to normal. I ended up deleting the inbox .msf file and re-opening TB to rebuild index. Thanks for all of your suggestions it was appreciated.