The potx error

# The first parameter to t() should be a literal string. There should be no variables, concatenation, constants or other non-literal strings there. At t('If this option is selected, the selected taxonomy terms will be copied to the '.variable_get('biblio_base_title','Biblio').' keyword database and be displayed as keywords (as well as taxonomy terms) for this entry.') in biblio/biblio.admin.inc on line 271. Read more at http://drupal.org/node/322732
# The first parameter to t() should be a literal string. There should be no variables, concatenation, constants or other non-literal strings there. At t('The orphaned authors ('.implode(',',$authors).') have been deleted.') in biblio/biblio.admin.inc on line 1636. Read more at http://drupal.org/node/322732
# The first parameter to t() should be a literal string. There should be no variables, concatenation, constants or other non-literal strings there. At t('If this option is selected, the selected taxonomy terms will be copied to the '.variable_get('biblio_base_title','Biblio').' keyword database and be displayed as keywords (as well as taxonomy terms) for this entry.') in biblio/biblio.import.export.inc on line 118. Read more at http://drupal.org/node/322732
# The first parameter to t() should be a literal string. There should be no variables, concatenation, constants or other non-literal strings there. At t('Importing '.$import_file->filename) in biblio/biblio.import.export.inc on line 206. Read more at http://drupal.org/node/322732
# The first parameter to t() should be a literal string. There should be no variables, concatenation, constants or other non-literal strings there. At t("Publications by ".$term[0]) in biblio/biblio.pages.inc on line 286. Read more at http://drupal.org/node/322732
# The first parameter to t() should be a literal string. There should be no variables, concatenation, constants or other non-literal strings there. At t("Keyword ".$term[0]) in biblio/biblio.pages.inc on line 329. Read more at http://drupal.org/node/322732
# The first parameter to t() should be a literal string. There should be no variables, concatenation, constants or other non-literal strings there. At t(ucfirst($link)) in biblio/biblio.pages.inc on line 540. Read more at http://drupal.org/node/322732
# The first parameter to t() should be a literal string. There should be no variables, concatenation, constants or other non-literal strings there. At t($button_text) in biblio/biblio.pages.inc on line 765. Read more at http://drupal.org/node/322732
# The first parameter to t() should be a literal string. There should be no variables, concatenation, constants or other non-literal strings there. At t($string,array('%a'=>$filters[$type]['title'],'%b'=>$value)) in biblio/biblio.pages.inc on line 942. Read more at http://drupal.org/node/322732