I'm running nightlies of Shredder, and it auto updated today to [Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1pre) Gecko/20090616 Shredder/3.0b3pre]. With this version I can switch only between a few folders before the message pane starts showing the folder is empty. Then if I switch folders again, I get an Accounts/Advanced Features page. I disabled all addons, but I still get the same behaviour. STR: 1. Load Shredder. 2. Switch between email folders repetitively. Expected result: Should be able to see messages in folders. Observed result: After a few switches folders show empty, then show some kind of accounts/advanced features page.

I'm pretty sure this regressed between nightlies: [Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1pre) Gecko/20090612 Shredder/3.0b3pre] [Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1pre) Gecko/20090613 Shredder/3.0b3pre]. I'll keep running 20090612 and comment back here if it comes up in that build. It's somewhat intermittent. :(

This is bug 498145. Assuming all goes well, a fix should be in the June 18th build.