Error with variable $site_name_and_slogan

Hi,

I really love the work you put into porting this site. These themes are high quality. Thank you!

After first enabling the theme I got an error due to an empty variable $site_name_and_slogan. I am not familiar with this new variable in D7.

Anyone with this same issue should edit their page.tpl.php so that the variable is checked before printing like so:
if(isset($site_name_and_slogan)) { print $site_name_and_slogan;}