Just installed this on my drupal site (drupal version 7-x.dev, version 2nd August) and I got a bunch of errors

Installed on SME Server v8 (contribs.org) and as soon as I tried to administer it I got:

Notice: Undefined variable: grid_width in include() (line 11 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/sites/all/themes/alphorn/templates/page.tpl.php).
Notice: Undefined variable: grid_width in include() (line 50 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/sites/all/themes/alphorn/templates/page.tpl.php).
Notice: Trying to get property of non-object in drupal_alter() (line 983 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/includes/module.inc).
Notice: Trying to get property of non-object in drupal_alter() (line 983 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/includes/module.inc).
Notice: Trying to get property of non-object in drupal_alter() (line 983 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/includes/module.inc).
Notice: Undefined variable: main_group_width in include() (line 55 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/sites/all/themes/alphorn/templates/page.tpl.php).
Notice: Undefined variable: content_group_width in include() (line 61 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/sites/all/themes/alphorn/templates/page.tpl.php).
Notice: Trying to get property of non-object in drupal_alter() (line 983 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/includes/module.inc).
Notice: Trying to get property of non-object in drupal_alter() (line 983 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/includes/module.inc).
Notice: Trying to get property of non-object in drupal_alter() (line 983 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/includes/module.inc).
Notice: Trying to get property of non-object in drupal_alter() (line 983 of /home/e-smith/files/ibays/Primary/html/drupal-7.x-dev/includes/module.inc).

Help!