k3b-mini-1.0.4-alt3
k3b-1.0.4-alt3

Steps to Reproduce:
1. I started k3b path/to/an.iso
2. the k3b's browser was showing /mnt/usbmem1/ (remained from the previous uses
of k3b)
3. the I started recording of the image
4. then I did umount /mnt/usbmem1 (the image wasn't on /mnt/usbmem1/, of course)
Actual Results:  
the recording got interrupted, k3b reported that it failed recording the DVD+R.

Expected Results:  
the recording isn't interrupted by an unmount of an unrelated fs (if it is
unrelated to the location of the image)