There appears to be a bug in the code and you might not be doing anything wrong. My site does not show this error on screen, but I checked my cgi_error_log to see what it says and it contains similar warnings, repeatedly, like so:
Warning: explode() expects parameter 2 to be string, array given in …/wp-content/plugins/seo-ultimate/includes/jlfunctions/arr.php on line 50
Argument #2 should be an array in …./wp-content/plugins/seo-ultimate/includes/jlfunctions/arr.php on line 51
In Your case: I think your array text may be corrupted by special characters appearing inside the fields mentioned in the alert messages . check your entry fields for those seo-ultimate fields, do not contain any special characters like the & (amperstand) or $(dollar sign) or the double or single quote signs. Remove the characters. See if now works.
My site: artistsonoma.com
