I also just experienced this bug, on a new GMail IMAP account I set up. Tried to go in and configure the "IMAP Headers" to "Fetch all headers". Upon clicking OK, evolution crashes-- very reproducible.
I've also generated a backtrace, which I'll attach here. This is on Ubuntu Intrepid x64, using latest Evolution from repositories.
I also just experienced this bug, on a new GMail IMAP account I set up. Tried to go in and configure the "IMAP Headers" to "Fetch all headers". Upon clicking OK, evolution crashes-- very reproducible.
I've also generated a backtrace, which I'll attach here. This is on Ubuntu Intrepid x64, using latest Evolution from repositories.