This is my story: bought the macbook pro in late 2006, and used almost as a desktop replacement, so that i knew i would have stressed battery. Then i was quite happy even with a 85% health with 162 cycles. Then upgrated to Leopard. Now battery health is at 43% with 171 cycles. battery problem? You could say...but what if even my brand new second battery used maybe for 6 hours and with 2 (two!) cycles dropped already to 92%? At least i am not the only one to have this problem. Check this link http://discussions.apple.com/thread.jspa?messageID=6208848 I believe anyway that at Apple they are aware of this, since the guy at assistance, after having realized i am not a complete noob and that i already performed all the reconditioning procedures ever conceived by a human beeing admitted they know about this and told me they would have called me back soon...still waiting but it was only 1 hour ago! I'm updating this post as soon as i get news.