It's much worse than that!
Especially if you do not buy a-brand cards (kingston, sandisk etc) from a reliable source there is a very good chance that its a fake
! Not only may it be of bad quality it may not even have the capacity it claims! For example a "16GB" card may actually contain just 2GB of flash, and when full simply overwrite older files!
The internet is awash with horror stories about it, and tips on how to catch fake cards, like this blog:
http://www.ryukent.com/2011/05/how-to-d ... sd-memory/
Just google for "fake kingston", or "fake sandisk"!
I have a feeling that a lot of "SD-card corruption issues" are simply caused by fake SD-cards!
Oh, I know. I was just commenting on genuine Kingston cards and their foibles, specifically.
As far as fake cards go, there's a great resource on that here
, too, for what it's worth. It goes without saying that, personally, I would avoid eBay, many third-party sellers on sites like Amazon/Play.com/etc., and so on, as far as flash-media goes.
Worse still is that it's harder to tell from price alone, nowadays, since, last I checked, some vendors of fake media, have started charging real-media prices, now.
Here's the Linux and Mac OS X equivalent to H2Testw
, too, by the way, just to complement your link.
It's really nice to see someone else who keeps up with this stuff. Big thumbs-up from me, good sir!