404 error – related to W3 Total Cache ?

  • When checking my site in YSlow, it shows four requests for image files which are not found (404).

    The files are ‘loading.gif’, ‘next.png’, ‘pref.png’, ‘close.png’.

    It’s looking for them in a directory which does not exist (i.e., I didn’t see it when browsing my server with an FTP client): sitename.com/skins/default/

    These file names are also appearing in other YSlow sections – e.g., lacking a far-future expiration date.

    When I disable W3 Total Cache, empty browser cache, reload, and re-scan with YSlow, these errors disappear.

    Any ideas of what’s going on here or how I can troubleshoot this?

    Site is here.

    Thanks!

    https://www.ads-software.com/plugins/w3-total-cache/

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  • Thread Starter Bob

    (@bobk88)

    Correction: third file in list should be’prev.png’, not ‘pref.png’.

    Thread Starter Bob

    (@bobk88)

    Update:

    After hunting around folders on my server, I discovered one that contains files with these exact names. It’s part of a paid plugin called WP Lightbox Ultimate.

    Also: when I disable the Lightbox plugin, these 404 errors go away, and so do other issues that had appeared in YSlow and Google Page Speed (and other diagnostic tools) related to these image files and plugin scripts.

    So it appears that the problem is an interaction between W3 Total Cache and the plugin.

    I don’t recall seeing the 404 errors when using WP Super Cache, but that plugin wasn’t working well on my site. I replaced it with W3 Total Cache yesterday and noticed an immediate improvement, both subjectively and in the performance scores at YSlow, etc.

    I’ve contacted the Lightbox plugin developer.

    If anyone has ideas how I might otherwise look into this, I’d appreciate any pointers.

    Thanks!

Viewing 2 replies - 1 through 2 (of 2 total)
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