I'm also noticing that inserting a SD card does not create /dev/sdb1 but on removing the SD card the line "error: /dev/sdb: No medium found" is added to /var/log/upstart/udev.log.
I'm also noticing that inserting a SD card does not create /dev/sdb1 but on removing the SD card the line "error: /dev/sdb: No medium found" is added to /var/log/ upstart/ udev.log.