Disregard my prev post. PROBLEM RESOLVED!!

It was NOT this app that caused the issue.

It was a plugin from mailchimp called Ecommerce 360 that was causing me grief, and a quick search through these forums pointed me to instructions for debugging/correcting the issue. (Thanks Dr. Byte!)

Everything's fine now, site's up & running.

I'll try to install google analytics again later, after my nerves recover. :-)