Yesterday when I was rigging my 6.8, I noticed a problem with the mast:
http://www.niksula.cs.hut.fi/~jmunkki/MISC/mast/ferrule.jpg
The metal band that keeps the top part from sliding down over the bottom has started to split from the bottom. It's not a very long crack yet, but it got me really worried.
The mast is exactly one year old, so unless they are extremely picky about the warranty period, it should still be under warranty. I have contact the dealer and I posted a note on the North discussion forum.
I bet someone else here has seen the same problem though: did the mast break or did you get it replaced before it did? Is it safe for me to sail this mast a few more times or will it just fail catastrophically and ruin my day when I least want it?