I have a set of size 2 DPNs, and while they did bend a good bit while I was knitting socks with them, they didn't break. I also have some "jumper" needles (straight needles with cords at the end to hold a lot of stitches) in sizes 6, 7, and 8. I got those in a swap, and I've enjoyed working with them.
RiverDaughter, you might want to email or call the Clover company about your brittle needle - they may send you some replacements. I know I heard of one company that will replace broken needles, but I don't remember what it was - either Clover or Brittany, I think.