Johnathon Suker <email@example.com> commented that my technique of copying new System Folder files over the old ones and then moving them all back again could lead to trouble if some old and unnecessary System Update file or something similar was included by this process. I should have mentioned that I always go through the resulting folders and manually scan for files I know won't work with the new System. A slower method might involve opening both the old and the new folders and manually moving (from the old to the new) just non-Apple files that you know will work. [ACE]
Enabling Auto Spelling Correction in Snow Leopard
In Snow Leopard, the automatic spelling correction in applications is not usually activated by default. To turn it on, make sure the cursor's insertion point is somewhere where text can be entered, and either choose Edit > Spelling and Grammar > Correct Spelling Automatically or, if the Edit menu's submenu doesn't have what you need, Control-click where you're typing and choose Spelling and Grammar > Correct Spelling Automatically from the contextual menu that appears. The latter approach is particularly likely to be necessary in Safari and other WebKit-based applications, like Mailplane.