Without the following fix, sNews 1.7 can't delete files (images, stylesheets etc.).
In sNews.php, find line 3107
Replace that line with:<a href="?action=snews_files&task=delete&folder='.$path.'&file='.$file.'" title="'.l('delete').' '.$file.'" onclick="return pop()">
If issues still exist, report here
Note: 1.7 is not updated yet (no access).