It's fine for storing your media files. The data corruption bug is really to do with editing (large) files in duplicated shares on the server over a period of time. For example, quicken databases, and other examples within the KB article.
I've been happily using WHS since early betas, and also using the WHS server as an MC12 library server. I have some 380GB of MP3's managed by it, flawlessly. I also have my library stored on it in duplicated folders, and it's been fine so far (running for several weeks now). I use it both as a shared library, and as a library server. I must admit, I haven't done a whole lot of editing of the library, however.
Microsoft have stuffed up the way they have implemented their Disk Extender technology, which is why this data corruption bug exists. I actually suspected this might happen with some of the early betas. It will be interesting to see how they fix it.
Dwayne