Foldit sometimes crashes or gets stuck when checking or unchecking the "Connect using proxy" box and clicking on "Quit" or "Play".

Steps to reproduce:

1. Start Foldit
2. Check the box to use a proxy and enter any address with port (e.g. "localhost:8080")
3. Click "Quit" (crashes here with an unhandled exception)
4. Start Foldit
5. Uncheck the box to use a proxy
6. Click "Play" (hangs with 100% CPU usage) or "Quit" (crashes).

The bugs don't occur every time but fairly often. I am using Windows 7.