Sensible defaults for Mac OS X Lion

.osx

# Expand save panel by default
defaults write NSGlobalDomain NSNavPanelExpandedStateForSaveMode -bool true

# Disable the “Are you sure you want to open this application?” dialog
defaults write com.apple.LaunchServices LSQuarantine -bool false

# Disable shadow in screenshots
defaults write com.apple.screencapture disable-shadow -bool true

# Automatically open a new Finder window when a volume is mounted
defaults write com.apple.frameworks.diskimages auto-open-ro-root -bool true
defaults write com.apple.frameworks.diskimages auto-open-rw-root -bool true

# Display full POSIX path as Finder window title
defaults write com.apple.finder _FXShowPosixPathInTitle -bool true

# Avoid creating .DS_Store files on network volumes
defaults write com.apple.desktopservices DSDontWriteNetworkStores -bool true

# Show the ~/Library folder
chflags nohidden ~/Library

# Kill affected applications
for app in Safari Finder Dock Mail; do killall "$app"; done

# Fix for the ancient UTF-8 bug in QuickLook (http://mths.be/bbo)
echo "0x08000100:0" > ~/.CFUserTextEncoding