Strange : https://github.com/LimeSurvey/LimeSurvey/blob/43cefc3a2d829574cf788376bca2a844e2923dd5/application/controllers/UploaderController.php#L172 ?

Via JS ?

what is done via JS?

The control about name.

I'ms sure i have already sent PNG for png file in upload file.

I'ms sure i have already sent PNG for png file in upload file.

Extension seems to be checked and lowercased here, as you said.
https://github.com/LimeSurvey/LimeSurvey/blob/43cefc3a2d829574cf788376bca2a844e2923dd5/application/controllers/UploaderController.php#L172

The control about name.

Not sure what you mean, sorry

Extension seems to be checked and lowercased here, as you said.

But : you report here it don't work, right ?

Participant uploads fails if it contains resource with uppercase extension

I can not reproduce on 3.28.54

https://demo.sondages.me/87986

I was picking up the lead you left on the other PR.
I will just close this.

I was picking up the lead you left on the other PR.

I jsut give an example of potential way to do. I never write there are an issue

I could reproduce it

I could reproduce it

What version ?