Cracked Glass

As I'm staring at my great little glass crackle beads, I'm reminded of the cracked windows in this house. Only 8 years old, it's surprising to me that 2 of our windows have randomly, without help from the children, cracked. They already let in lots of frigid air, so with cracks I'm just not feeling too warm about them right now. The manufacturer doesn't sound surprised by this and does nothing to fix them! So sad. Now about 6 of the windows in our morning room (which is ALL windows) are showing condensation between the panes. I wonder if this is considered normal too?