Media Library thumbnail and View corruption

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  • #774950

    Thumbnail and View displays of certain PNG images in my Media Library appear corrupted. I have prepared an e-mail with PDF attachment describing and showing examples. To what address should I send it?
    Blog url:


    The PDF attachment contains screen shots.




    You can send it to us at, and we’ll be happy to take a look at it.





    May you are having some trouble duplicating this problem. Here is some more information that might help.

    The problem as I reported it appears on an (Intel-based) Mac Book running Safari v5.1.2 under Mac OS X 10.6.8.

    This problem does not appear on a G3 iMac running Firefox 3.6.24 under Mac OS X 10.4.11.

    This problem appears differently (some blank images instead of corrupt images) on a G3 iMac running Safari v4.1.3 under Mac OS X 10.4.11


    Even more interestingly, this problem does not appear on an (Intel-based) Mac Book running Firefox v7.0.1. under Mac OS X 10.6.8.

    Stay tuned while I log out install a Firefox update and log back in and try again with the latest Firefox.


    Better still, this problem does not appear on my (Intel-based) MacBook running the lates Firefox v8.0 under Mac OS X 10.6.8.

    I do not plan to use my old G3 iMac for updating my blog, so my earlier observations about what works or does not work there are not important to me. (My observation of what works was based on the appearance of the thumbnails in the Media Library display.)

    It appears now that my problem may be with my use of Safari – due to a defect in Safari or due to an incompatibility of WordPress code with Safari for those displays.

    So, the question to WordPress is: what action will WordPress take to address this problem? – such as kicking the Safari ball down the road to Apple and recommending that WordPress users use Firefox.

    #775200 says “Note: We recommend that you use either Firefox or Chrome for optimal performance with”

    I wish that I had noticed this earlier. Having found it is slightly reassuring, but not entirely satisfying. I appear to be collateral damage in the browser wars.

    It would still help me to know what position WordPress takes with respect to this specific problem.


    Howdy, Safari should work properly with all aspects of I searched for the email you mentioned sending in earlier but couldn’t find it. Did you send it from a different address?


    It was sent from (email redacted)



    Thanks, I found it and will respond via email.


    Recent Email exchanges with at least one of the WordPress support people shown on this page leads us to the conclusion that my problem is the use of Safara v5.1.1 or v5.1.2 under Mac OS X 10.6.8 (Snow Leopard).

    For Mac users of this exact combination of browser and operating system, there are at least four effective measures to deal with this problem:

    1) use the Firefox browser from Mozilla
    2) use the Chrome browser from Google
    3) upgrade to OS X 10.7.2 (Lion)
    4) ignore the corruption of the thumbnail image displays – and do not delete and replace a file whose thumbnail image appears corrupted – replacing it seems to require re-inserting it into every post that used it.

    Thanks to the WordPress guy(s) who patiently followed up on this.

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