I had broken images, but 4.4 exposed them

We migrated from Drupal to wordpress back in July. Our site has been working great. Been keeping up to date with releases. Just bumped up to 4.4 and we have a number places on the site where we have broken images. It seems to be exposed by the responsive design changes made in wp_calculate_image_srcset. We end up with bad URL’s in the srcset. Our image URL’s are in wp_postmeta as /home2/{my directory}/public_html/wordpress//wp-content/uploads/winter2014/{imagename}.jpg. Note that we used a non-standard upload subdirectory. WP would have made that a year/month. But, this worked until 4.4

Now, these images do not show up. I could SQL sweep through the _wp_attached_file fields in wp_postmeta and simply snip off the offensive part. Unfortunately, I also have to clip it in the _wp_attachment_metadata field as well. The complexity here is that I have to adjust the length value that precedes the file name.

Any plug-ins out there that people can point me to? Or, an alternative solution to rebuild all the _wp_attachment_metadata values?

If you need a specific example, I’ll be glad to message back with a URL to our site that demo’s the brokeness.