Hey Alan,

Can you be more specific about which notes, which strings, are not sounding right? Or, even better, shoot me a little video with your phone and send it to me at [email]LisaMcC@me.com[/email]: a close up of your hand playing the C chord. Strum it so I can hear it. Describe the problems. I'll see if I can determine anything that might be helpful to you.
Not to worry - help is on the way!