This worked perfectly for me. Like Babagua says, open the functions.php in your child theme and search/update that code. If the $content_width is not set in your functions file, you may need to override the parent functions file. This thread may help:
https://wordpress.org/support/topic/override-function-for-image-sizes-in-child-theme?
Thank you so much for posting this. I also found a ow.ly link buried in one of my text widgets. I had to search the database to find it.
Yes, I’m having the same problem. I’m using WP 3.5.1 and version 1.9.3 of CFS.
