Bonnie wrote today and pointed out that on my InDesign CS4 keyboard shortcut reference guide, I've listed the same keyboard shortcut (command-delete) for both "Delete one word to the left" and "Delete one word to the right".
Believe it or not Bonnie, this isn't a typo (though I'll admit it could be more clear!) This brings up an issue that many people don't understand, so I thought it would be worth explaining here.
Some Macintosh keyboards have two delete keys, one that's two rows above the return key, and another that is between the main keys and the numeric keypad, directly above the cursor keys.
On this type of keyboard, the left-most delete key deletes a single character to the left of the text cursor, and the right-most delete key deletes a single character to the right of the text cursor. Likewise, command-left delete key deletes a word to the left of the text cursor, and command-right delete key deletes a word to the right of the text cursor.
If you have a Mac laptop or a smaller Mac keyboard that only has a single delete key, fn-delete deletes one character to the right, and fn-command-delete deletes one word to the right.
On most Windows keyboards, the left-deleting delete key is labeled as "Backspace" and the right-deleting key is labeled as "Delete" so Windows users don't have this confusion.
I've updated the InDesign CS4 keyboard shortcut reference guide to clarify this issue.