ok-I found my problem (with your help Studio V-thanks!).
I had copied my Cakewalk Content folder to my data drive at some point while using X2, while leaving the original folder on my system drive. When X3 installed, it dutifully (I think-I don't recall doing this manually) put the X3 content in the folder on my data drive. However, it was looking to my system drive folder for the metronome wav. files. (I hope I'm making sense.) Once I copied the Sonar X3 content folder to the Cakewalk Content folder on my system drive, I had metronome sounds again.
I probably didn't notice this because I am able to point things like template folders where ever I put them, which in this case was my content folder on my data drive.
I guess my question for Sonar or anybody would be is there any way for me to direct the metronome to a certain sound folder? I much prefer keeping the content in my documents folder on a data drive. Easier to manage, easier carbonite backup, etc.
Thanks!
Andrew