1 file modified after compression

Hi Paddy,

Thanks for getting in touch.

This notification most likely shows because another plugin changed the original or one of the thumbnail sizes of your image. For each image we store what the size was after compressing it. If we detect that the file size on disk is different from what we store this message pops up.

Which other plugins do you use? And what happens when you compress the image again? How long does it take for the notification to appear again?

Comic easel, WP Super Cache, wp-jquery-lightbox, Lightweight Social Icons, Akismet, Broken Link Checker, GP Premium then in Jetpack I’m using Comments, Contact form, Enhanced Distribution, protect, publicize, sharing, site stats, sitemaps

When I re-compress things re-
compress. after a day, or two or 5 etc they slowly start getting changed again. Not all at once just randomly here and there.

The funny thing is that I don’t think there are any thumbnails on my actual site.

The fact that there is a difference in time between images showing the notification makes me think this might be related to caching. Our plugin might not be compatible with WP Super Cache perhaps? I am not sure about this, but perhaps you can disable the plugin to see what happens.

If you like, we could assist you by taking a look into your WordPress installation. Perhaps you can send an email to us at [email protected] to discuss further options.

I’ll disable it for a while, re-compress them all and keep an eye on it and report back.

Allright we will await your reply. If you need more from us don’t hesitate to ask !

Six days later and the issue has not returned. So it looks like WP-Super cache is the culprit. The nice thing is that I really haven’t noticed any significant speed decrease with it turned off. I certainly am not going to complain about a 1 point drop with pagespeed, especially when I had a really large increase just by compressing the images.

That’s good to hear ??

Also very helpful for us to know that WP Super Cache changes something in the media library which makes it incompatible with our plugin.

Have a good day and let us know if you ever need more assistance !

I apparently spoke too soon. The “1 file modified after compression” has started creeping up again. Unfortunately I do not know when it started. sometime since last Saturday I think. I still do not have caching installed, but I have another plug in that I think is/or may also be causing the issue. I will look into it and report back

So I narrowed down when it happens. If you are on a mobile device and visit a page that has the blog entry listed, such as search results, or the archive drop down it will “modify” the files. You don’t even have to load that particular entry, just the synopsis.

This may have just started with the recent wordpress update, but I cannot be sure.

I also still do not know if it’s a plug-in causing it, my theme (generatepress), or wordpress itself. More to come

The culprit appears to be the Jetpack Photon plugin. Not sure why that was even on, or when it turned on. I’ll re-compress and keep an eye on it to verify. It was definitely modifying files before loading the actual entry (visually at least)

Thank you for the information so far!

This information is great for us as it will help diagnose problems for other users. We look forward to hearing the outcome of your current compression.

Photon is disabled and something is still modifying images. Going to try disabling wp-jquery-lightbox again and see if it changes anything. It didn’t before, but maybe something with the WP update changed that.

Trying to compress them isn’t doing anything now. the same files that have “modified after compression” still have it even after I chose compress all. Any thoughts?

Adding a new image will compress. Well it will compress as well as it can considering I’m on a host with an outdated cURL. So it isn’t that it is not compressing at all.

I’ve deactivated both Photon and wp-jquery-lightbox.

currently I have multiple files that are lingering with the “modified after compression” error. Most are on the “Medium” photo when I go into the details. That at least makes sense. Some also seem to have “medium_large … Size is no longer in use” (Which I do recall ever seeing, but I’ve had this blog for a number of years and that may be a holdout from an earlier version of wordpress?) If I compress these images, it looks like they are compressing, but the error remains and there is an increase in my compression count by one. So I would think that it’s compressing.

Is it possible that there is just a flag that is not getting updated and that the file is actually compressed after all?

Would it be worth it to maybe change medium size from 300 to say 450 (I’ve been thinking about this anyhow)un-tick Large since I really don’t use it, install re-build thumbnails or something similar? Maybe it’s a simple database corruption?

I changed the medium thumbnail setting to 400 which better fits my page anyhow and then used Ajax_Thumbnail_Rebuild to rebuild the thumbnails. I then compressed all.

So far they have all actually responded and I have no “modified after compression” notices. At least as of 6:33AM PST ??

This isn’t a solutions, but it did make it so that I can at least see when a new file was changed. There were just too many that had the modified notice showing up.