Thanks for the list of corruption problems. Schmots points this out in his blog guide (see Post #2 of this thread). I may have had a corruption problem on a Transcend card but I didn't know about fsck then and ended up doing a clone from scratch. My problems were

-MicroB browser wouldn't load
-Apps wouldn't install

Now I run fsck occasionally as a prophylactic. I don't know if this works. (Though I haven't gotten pregnant yet.) Out of maybe 4 runs, once it reported that it fixed an error. (I've run it with Schmots's variables that make it fix problems automatically, which maybe forces it to report less, too, I don't know.)