"jpeg" image upload overwrites "jpg" images with the same (other than extension) filename

[koryp]

If an image is uploaded as "image1.jpg" and then another image is uploaded as "image1.jpeg", the thumbnails of the original images are overwritten because the thumbnail extensions are forced to "jpg" instead of sticking with "jpeg".

Haven't tested, but might also be an issue with "jpe" ... possibly also with "tiff" vs "tif"

... probably too old to be relevant, but my searching found this really old ticket: #16458

Just tested and replicated the issue in 4.4.2, but originally noticed it in 4.3.1 ... didn't test earlier versions.

[markoheijnen]

First of all thank you for this bug report. That ticket does help since I guess we broke it again in 3.5 when we did a full rewrite of the logic. And probably with we, I mean I. I can remember that it was something that was discussed but I have to look into it first since it has been a while.

[markoheijnen]

I haven't yet been able to reproduce it yet. For me it does seem to work good. Do you use any related plugins that could cause issues?

[azaozz]

Did a quick test and can't see any file extensions changed/overwritten. .jpeg remains .jpeg no matter what (as it should be). Perhaps this is caused by a plugin or your theme? Can you re-test with plugins disabled and one of the default themes.

[jaspermdegroot]

Also tested this, but can't reproduce the problem either.