User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/3.0.195.33 Safari/532.0 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091126 Shredder/3.0 Each time I close the program, it re-opens itself after 3 seconds. If I close the process in task manager it will stay closed until I open it again. Consistently 3 second intervals from close to open. Win7x64 fresh install. Reproducible: Always Steps to Reproduce: 1. Open program. 2. Close Program. 3. Wait three seconds. Actual Results: From start-up of my machine, after the first time I open shredder, it works nicely. When you close it, it reopens automatically, 3 seconds after exiting. That includes file-exit or clicking the X. Expected Results: I suppose it should stay closed once you exit it! Default theme, added two mail accounts, identical set used from thunderbird 1 old software. fresh install of win7x64, downloaded thunderbird3x64rc2 which comes up as shredder. Love it otherwise!

Does this happen if you use the official 32-bit version of Thunderbird from http://www.mozillamessaging.com/en-US/thunderbird/early_releases/downloads/ ?