I have a 2010 Gary Fisher Cronus, when I brought the bike in for a tune up this spring the bike shop told me they wouldn't do it because of cracks around the seat post. They pointed out that I had my seat post so high that it wasn't able to give adequate support. I will note that last year I would hear some loud "pops" when going over bumps. I always assumed it was a rock hitting my frame. The shop found the cracks with a light.
I went and bought a longer seat post and I have been riding the bike all season.
Questions: Will my frame fall apart from underneath me? If I can't see the cracks, are they still repairable? Is there an easy way of getting an inventory of the cracks on the frame? At what point is the frame just plane old and I need to tell my wife I need to buy a new one? Finally: Is there a proper way to frame the question so my wife will say "Yes"
The last question was a joke :)