Same problem here.
when I attach usb cable, it mounts automatically all partitions I have in. (3)
Just after this, when I try to unmount one of them something prevents me from unmounting it with error message.
Go further, when I try to unmount, the icons disappear, I get the error message (Cannot unmount volume) and meantime icons reappear.
The only method to unmount them is from terminal with
sudo unmount /media/.... etc.
Same problem here.
when I attach usb cable, it mounts automatically all partitions I have in. (3)
Just after this, when I try to unmount one of them something prevents me from unmounting it with error message.
Go further, when I try to unmount, the icons disappear, I get the error message (Cannot unmount volume) and meantime icons reappear.
The only method to unmount them is from terminal with
sudo unmount /media/.... etc.
It's not a wishlist thing, it's a real bug.