Bathroom Improvement

We have a new house, still under warranty, and the builder is stating that the bubbles in the bathroom paint are not his responsibility to fix. Is he right?

I sold my primary residence in 2006, for $125,000 and bought a new house for $205,000 in the same month. I used 75% of the profits from the sale ($30,000) as the down payment for the new place. My question is twofold. Do I have to pay taxes on the profit I made from the sale of my house, and secondly, can I deduct the improvements I made on that house, such as appliances, bathroom remodeling, etc.?