I noticed some issues previously surrounding certain images and thumbnails on my sites not showing (showing the image not found placeholder) but after the latest update I thought it was all fixed and reactivated photon and the thumbnail issue seemed to be fine when it came to featured images (the location of the previous fault).
However I'm getting lots of 404 errors from the seomoz spider about the images on a lot of my other pages, ones that I previously hadn't noticed problems with my first activation of photon.
It appears to be just on large sized images. It's happening on lots of different pages but this is one of the posts that have been badly hit: Minecraft Papercraft.
When checking my analytics I noted a pretty huge jump in bounce rate and a massive drop in traffic to my site on some of my better performing posts. The posts bouncing visitors are the ones that usually do well and when checking them to find why I saw that the images seemed to be missing or not loading.
That's where a large proportion of my engagement happens so I would like to disable photon so that it doesn't farther damage the site but in the interest of diagnosis I will be leaving it active on the live site until someone with more expertise than I can have a look.