How can I remove an icon from dock in ML? In previous releases of OS X, you were able to remove an icon from the dock by just dragging it off. However, this does not seem to work anymore.

How can I remove a program's icon from the dock?
This is actually still possible; however, a safe-guard to protect novice users has been added. There is now a minimum distance that you need to move the icon away from the Dock for it to be removed.

Once that distance is reached, the cursor will show a wrinkled paper icon.

Simply release the mouse then, and the icon will be removed from the dock normally.

Alternatively, one can still use the context menu of the icon (right-click or long-left-click the icon to make it appear) and go to Options > Remove from Dock.