Tracking Status Tracking Not InstalledLast checked: 31-Dec-1969 16:00:00 PST
That's a bit of a glaring error message, I put it into google and got the following page
http://www.google.com/support/forum/p/Google+Analytics/thread?tid=0b189a4f8bee86b2&hl=enI pasted the code into /public_html/includes/templates/template_default/common/tpl_main_page.php it seems to be the only php file with body tags in it, is this correct?
If there are any changes to core code it's preferable to put any changes into an overrides folder (i.e., public_html/includes/templates/(your template name)/common) in case you need to upgrade or do any work on your site. However in instances where you do put it into the main code it's worth keeping a note of what has been changed and where so you can easily repeat it if you need to. Otherwise yes tpl_main_page.php is the right file.
The php file I made with the tracking code in, I uploded to /public_html/includes is this correct?
If your folder structure reads as above public_html/includes .... then yes it's in the right place.