After talking to pitti it seems that there is a kernel bug as well. After removing the card (physically) from the reader udev and udisks see a change entry with DISK_MEDIA_CHANGE=1 but the partitions are _not_ removed from the system.
After talking to pitti it seems that there is a kernel bug as well. After removing the card (physically) from the reader udev and udisks see a change entry with DISK_MEDIA_CHANGE=1 but the partitions are _not_ removed from the system.