Several readers are reporting problems with the Energy Saver pane of System Preferences after upgrading to Mac OS X 10.3.4. Problems include Energy Saver's inability to remember sleep or wake-up settings, freezes when attempting to open Energy Saver, and more.
MacFixIt reader Antonio Adolfs writes "I use Mac OS X 10.3.4 version and the trouble for me is the Energy Saver system preference. When I try to set it to "Never sleep" and close it, the settings do not stick."
A poster to Apple's discussion boards adds "For some reason, my Dual G5 with OS X 10.3.4 has stopped going to sleep automatically after the 15 minute sleep time I´ve set in the Energy Saver panel."
Possible solutions Apple has a Knowledge Base article describing a few techniques for resolving Energy Saver problems, including deleting Energy Saver Preference and Finder Preference files, as well resetting the PRAM.
Other users have found that some USB devices - particularly optical mice - prevent proper automatic sleep or wake-up.
John Gruber, in a post to his Daring Fireball Web site, found that the .GlobalPreferences.plist file, an invisible document in the ~/Library/Preferences/ was causing his Energy Saver problems. Deleting the file restored proper operation, but also resulted in the erasure of some appearance settings.