On submission pages, e.g. the "Submit a Derived Work" page (mydomain.com//cchost/submit/remix), "colloborating" should be "collaborating". The misspelling originates in line 116 of ccHost/ccskins/shared/strings/all_media.php:
$GLOBALS['str_feat_list_any_collob'] = _('List any colloborating artists (Hint: NOT YOU)');
and can be fixed by editing the line:
$GLOBALS['str_feat_list_any_collob'] = _('List any collaborating artists (Hint: NOT YOU)');
Consistency suggests changing the variable name from "str_feat_list_any_collob" to "str_feat_list_any_collab", but of course this would require changes to a variety of files and might introduce some fragility to various upgrade or repair situations...?