And here's what my Gparted says about my clone SD (it should be identical to the internal SD, except for the bottom unallocated space):
Which version of gparted are you using? Mine is 0.9.1, ran under Fedore 15. The differences are that it does reports ext4 for 3 partitions (as Kobo's "mount" command), but it agrees with you on /data being ext2, and KOVOBOX being fat32. Why on earth are they using fat32 on the internal SD card? WHat advantage can it have compared to ext* file systems, given that it is Linux?