Seems it's unable to upload attachment with cyrillic filename.
The file does upload actually but then I receive an error message about invalid file name.
It's funny that I can see a proper filename at the attachment field and invalid (with '?' instead of cyrillic) filename in the error message simultaneously.
Here's a screenshot.
And there was the same issue while uploading to this forum.
Is there a workaround?
Maybe it's a php or mysql problem?

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