kathrynwp on "having trouble enabling the Jet Pack features"

Could you please try deactivating all your plugins and seeing if the error goes away? If it does, then reactivate each one-by-one and try Jetpack after each reactivation to find the culprit. To deactivate your plugins go to the Plugins overview page.

Here's some information on how to manage plugins:

http://codex.wordpress.org/Managing_Plugins