I came across an issue trying to add a RSS Feed, it seems that the Module does not like "https://" URL's. 
 
After digging into index.inc in modules\Syndicated_News\admin 
at Line 179  and Line 180: 
if (!ereg('http://', $url)) { 
	    	$url = 'http://'.$url; 
 
I changed this to: 
if (!ereg('http://|https://', $url)) { 
	    	$url = 'http://|https://'.$url; 
 
Also had to make this change at Line 266 and Line 267 
 
URL's with "https://" News Feeds are now being accepted 
		
			
				Attachment:
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				| Description | 
				Edited modules\Syndicated_News\admin\index.inc   to allow "https://" in URL's | 
			 
			
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