Genealogy software: GRAMPS

1. GRAMPS is a nice, open source (GPLd) program written in python that allows you to build up a database of family relationships, from which you can make genealogy trees
2. GRAMPS runs on mac os, and they say it should run on windows and linux too
3. It is very intuitive and easy to use
4. I miss the ability to see descendant family trees with siblings etc (like this), but perhaps there is a trick to do that.

Mac OS X finder not displaying thumbnails properly

Problem: Mac OS X Finder doesn't show the little thumbnails properly (where it used to before). For example, it will show thumbnails for .txt or .html files, but will only show a generic JPEG thumbnail for .jpg files
Solution: (From here) Go to (your home) > Library > Preferences folder, delete the com.apple.finder.plist file and the com.apple.sidebarlists.plist file if it exists, and then restart Finder from the force quit menu.