System 7.5.5 Update -- It's clear now that Apple has not yet released System 7.5.4, and in fact, according to sources, is fixing problems relating to the IR capabilities of some Macs. The update, when it comes out, will be renumbered to 7.5.5. The next mention of it in TidBITS will be when it's actually available. [ACE]
Option-Click in Scroll Bars for Jump Scrolling
In Mac OS X in general, and thus in most native Mac OS X applications, hold down the Option key and click anywhere in a window's scroll bar to jump to that spot (rather than scrolling one screen). If you like this behavior, you can make it the default in the Appearance preference pane. For "Click in the scroll bar to:" select "Jump to here."