Access Old-style Dock Contextual Menus in Snow Leopard
One of Snow Leopard's new features is Dock Expos
Lost in this new functionality, at least apparently, is the ability to view the OS X 10.5-style Dock contextual menus--those that offer options specific to the program. In 10.5, for example, if you click-and-hold on the Mail icon in the Dock, you can check for new messages or compose a new message using the contextual menu that appears.
As you may have discovered already, you can still get these menus to appear in 10.6--you just need to Control-click on the Dock icon, instead of using click-and-hold. (This also works in 10.5, of course.) Once you get used to using a Control-click, I think this structure provides a good solution--you get the old behavior with one action, and the new behavior with another.
However, if you really hate Dock Expos
defaults write com.apple.dock show-expose-menus -bool no killall Dock
With that, Dock Expos
defaults delete com.apple.dock show-expose-menus killall Dock
Thanks to Mac OS X Hints contributor Swordfish> for sending this one in, and to Jeff Johnson of Lap Cat Software, who discovered the hidden preference to disable Dock Expos