The Core Duo battery drain saga that was originally reported by Tom’s Hardware has resurfaced. Anand Shimpi later correctly proved that the battery drain bug had absolutely nothing to do with Core Duo, but was actually a problem with Windows XP SP2. Just yesterday, Microsoft got around to publishing a fix for the problem.
A patch has been released, but it doesn’t seem to target the problem specifically, but rather fixes a problem that could prevent the PC from entering idle state. If you have need for the patch, you can read the article and grab the link to it at DailyTech.