I have put a fix on some of our sites but that means I can’t update the plugin. If you could please put this fix in an update release that would be great. I know multiple others who have seen this issue. It would be a big help.
All you need to do is simply change in your class file class.photocrati_resource_manager.php the function print_marker() to what I have below.
Then it will work fine and this issue will cease for anyone experiencing the same thing as me.
@puda & @btuck044 – We have found most of the RSS feed issues that are being attributed to NextGEN Gallery recently are site that also have the most recent version of WordPress SEO by Yoast active as well. This is something to look at as part of the issue.
As to the suggestion to not print the marker, it has been forwarded to our developers in regards to this issue that came with updating the WP SEO plugin.