I added a 772x250 jpg image named banner-772×250.jpg to an assets folder yesterday but it's not showing up on the plugin page. I can see the file at http://plugins.svn.wordpress.org/global-content-blocks/assets/.
What have I missed that is preventing the image being displayed at http://wordpress.org/extend/plugins/global-content-blocks/?
Screenshot images that I moved to the assets folder are being displayed correctly, just not the banner.
Thanks in advance.