Product FRED said:
It's not really that it's unstable. It's that a lot of packages that some programs rely on will not run. For example, when I was flashing Android to my iPhone using the terminal, I had to add a package (a command) so that I could do it. Even though it installed, I couldn't get the thing to work. As soon as I installed Ubuntu 32-bit, it worked fine.

You can go ahead and try it, you're not really going to lose anything, especially if it's just for everyday usage (Internet, Multimedia, etc). But, for example, if you try and run Firefox x64, there's no Flash support since there's no 64-bit Flash plugin and you have to run the x86 version. Just a heads up.
Correction....There is x64 flash for Linux. Just not for Windows.
http://www.wilderssecurity.com/showthread.php?t=225426