I am pretty sure that this behaviour is a code update regression.

The "ignore all warnings" used to be checked in the uploadform by default in older versions during reupload. Personally I consider this a bad choice, because than it also ignores duplicates and filetype mismatches. As such though this might be a regression, I do think that the reason this has regressed was valid and should remain. It just needs more work I guess.

The real problem on Commons is not that you get a warning about the existing file, it's that the "Ignore warning and save file anyway" button on the confirmation page is disabled and unclickable, so you literally *can't* save the file except by selecting "Ignore any warnings" in advance.

Note that using the Add Media Wizard (via the mwEmbed) gadget is apparently another way to work around this issue, although it has its own problems (it insists on prepending "== Summary == " to the upload summary, sometimes several times, for some reason).

Disabling JavaScript also seems to make the button usable. Haven't figured out yet which script is disabling it, though.

Bryan.TongMinh wrote:

Ideally only the file-exists error is skipped and all other warnings are just passed through.

Bryan.TongMinh wrote:

(In reply to comment #5)

Ideally only the file-exists error is skipped and all other warnings are just
passed through.

Actually that is supposed to be already supported using a JavaScript called destWarningAck. Did Commons disable this somehow?

The issue is present on the English Wikipedia as well. Though we don't see the "disabled" button, so that must have another cause.

Bryan.TongMinh wrote:

Ah, might this be related to the broken JavaScript bug?

Bryan.TongMinh wrote:

Javascript from bug 22970 deployed. Does this fix the issue?

Bryan.TongMinh wrote:

Should be fixed with r65025

Bryan.TongMinh wrote:

Finally fixed with r65029