I recently switched from Outlook 2003 to 2010, and I'm having trouble using keyboard shortcuts to change styles in my emails. Under 2003 I used MS Word as my editor, and I gather that's no longer the way it works so maybe that's where I'm having the trouble. But Outlook at least claims that I can attach a keyboard shortcut to a style. Like this:

To set a keyboard shortcut:
1) Select Format Text from the ribbon.
2) Right click on any style in the Styles section.
3) Select "Modify..."
4) From the Format button at the bottom left, select "Shortcut key".


5) In "Press new shortcut key" type in the shortcut, for example "<Ctrl-s>o".
6) Click Assign. "Current keys" displays "Ctrl+S,O".
7) Click Close, then OK.

At this point if I go back and look again, "Current keys" still displays "Ctrl+S,O", so I take it the shortcut key has been successfully assigned. Next:

To use the keyboard shortcut:
1) Highlight one or more paragraphs of text.
2) Use the shortcut key, that is, type "<Ctrl-s>o".

This seems to work alright for paragraph styles when I haven't selected any text; the current paragraph is changed to the new style. But when I want to do it to five or six paragraphs at a time, all that happens is that the selected paragraphs disappear, replaced by "o"—in the old style, not the one I wanted to change them to.

Is there some setting I need to change? Is it a bug? Anyone know?