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Home/ Questions/Q 41659
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Editorial Team
Asked: May 10, 20262026-05-10T15:12:57+00:00 2026-05-10T15:12:57+00:00

When uploading a file (jpeg) via a form in IE7 I am seeing a

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When uploading a file (jpeg) via a form in IE7 I am seeing a mime-type of ‘image/pjpeg’ instead of ‘image/jpeg’ (as I see in Firefox or similar). It’s easy enough to work around this problem, but I’m just wondering why IE7 is behaving differently in this case?

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  1. 2026-05-10T15:12:58+00:00Added an answer on May 10, 2026 at 3:12 pm

    I believe it’s because the JPEG you’re working with is a progressive JPEG, which has a different mime-type.

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