However, I had a local evolution folder that contained a few years worth of inbox archives, which is useful when you have to dig something out from a past life. So, about once a week, I was still having to open evolution and search through that one folder. Today, I finally bit the bullet and decided to try to figure out how to get the contents of that local Evolution folder into Thunderbird. It turned out to be rather simple.
I found where the local Evolution folder lived (or more specifically, the email contents of that folder):
-rw-r--r--. 1 spot spot 553847184 2008-10-24 18:44 .evolution/mail/local/local.sbd/Inbox
I found where local Thunderbird folders live:
Then, I simply copied that file into the Local Folders/ directory as "Old_Inbox", and restarted Thunderbird. Thunderbird saw it, generated a new summary listing for it, in about 20 seconds, done. Fast search, easy access, no errors.
I then promptly took evolution out back and cured it of its rabies.
[spot@velociraptor ~]$ sudo yum -y remove evolution