I have a WD TV Live HD and I noticed some problems to unmount my external drive after the update to the firmware 1.06.43_V.
I made some tests and the problem seems to happen always when I leave WD TV inactive for some minutes (when I leave a video paused or simply inactive at the home screen). I don’t know the time exactly but it seems to be time enough to screensaver get active.
If I do this and try to eject the drive, that blue circle just keep spinning forever and the drive is not umounted. I’m affraid to damage my drive since I have no other choice than abruptly turn it off.
I have already turned off the screensaver but the problem still happening. My drive is a Hitachi 1 TB.