RAM Doubler, PowerBooks, and 7.5.3? Connectix reports it's investigating a problem using RAM Doubler 1.6.1 on PowerBooks. Apparently, the machines may crash when they wake up if they're running System 7.5.3. According to reports, installing Apple's low-level debugger MacsBug prevents the problem from occurring. [GD]
Mac OS X Zip Expanding Utility
Firefox (and possibly other applications) may ask you what you want to do with .zip archives that you download from the Internet. If you want to expand them with Mac OS X (rather than StuffIt Expander), you may be unsure of which application actually does the job. You're looking for Archive Utility (in Leopard and later) or BOMArchiveHelper (in Tiger). In either case, the application is stored in Hard Drive/System/Library/Core Services/. Don't move it from there, though, or you'll confuse matters.