I updated to the newest version of Thunderbird. I was having problems authenticating the accounts I have set up (I was required to do this after the update), but finally succeeded. Two of my accounts do not show all of the folders that are in those accounts. The other accounts are fine. When I try to subscribe, the missing folders do not show up even after refresh. The folders are in the web interface for those two accounts, and also show up fine in my phone. I removed the accounts and re-added them, but the folders still do not show up. The two accounts (Frontier) are hosted by Yahoo. I also have a regular yahoo account and those folders show up fine.