RICG Respoinsive Images Plugin errors

Thanks for your report. The Media/Assistant submenu “thumbnail” area/column is populated by calling the WordPress wp_get_attachment_image function. At first glance it does look like the “RICG Responsive Images” plugin has hooked that function and is trying to generate a thumbnail image for it, but the item’s “Attachment Metadata” has been corrupted.

You can view the Attachment Metadata by going to the Media/Edit Media submenu screen and scrolling down to the meta box MLA adds there to display the data. Compare an image that works to an image that doesn’t and get an idea of what’s been damaged. You can try re-uploading a damaged image to see if the new copy has valid metadata. You can also think through any editing or other modifications you made to the damaged image and try to reproduce the problem.

I don’t have any personal experience with RICG Responsive Images and can’t give you any more specific help. If you do find the cause and/or a fix, please update this topic so others can benefit from your experience.

I am marking this topic “Not a support question”, but I really appreciate the time you took to post your report and for your interest in MLA; thanks.