I don't use anymore ext4, but only ext3.
However I have the problem also if I:
1) format the first partition in vfat (so it's not a problem of journaling);
2) use swapon/swapoff command
I've also checked the sdcard on pc with badblocks (read/write mode) and everything is fine.
Furthermore I've partioned the trascend card in the same way of the other one, so also here the first partition is ext3.