I have been using 2.0 Beta 4 since it was available and have been impressed with it. Only recently have I stumbled on a problem, and that is on my wife's netbook running Window 7 Starter edition.
Clicking on the Eject button, the OS will tell me it is safe to remove the device. However, the drive light remains on. That makes me a little nervous. The first time I had this happen, the next time I used my USB stick the OS suggested it had not shut down properly, and did I want to check and repair any errors. Have not seen this message again.
Wondering if anyone has seen this in Windows 7, and suppose particularly in Windows 7 Starter edition? The netbook is an Acer Aspire One, model 532h