i have the same news on rss but on blog the news changed since day !

3 day scuse me

By RSS plugin, you mean "Newsfeed"?

another question about RSS FEEDS can we edit it so that it will also display a picture per topic?

no i mean rss feed 

Oxwall does not have RSS feed on its own. You mean you want a RSS feed?

If so, you can use external plugins in the store.

no i mean rss feed 

I use the free rss feed plugin or rss reader if you want 

is this a wordpress press site, where you took the feed?

provide the feed url, please

Hitch, I searched in google there's a delay in updating rss feed from tumblr, this has to do with something on the tumblr side. As rss does not have any settings to configure related to the updating of the feed. 

if your site runs full ssl https then no content from none ssl sites will show 
any content you wish to put on a full ssl site has to also be ssl https 

What files do you need for rss and what for exactly?

ow_libraries/rss and ow_system_plugins/base/components/rss_widget.php