verifyFilenameAgainstDenyPattern not UTF-8 save
I found a problem in verifyFilenameAgainstDenyPattern while using Helmut's upload_example extension.
When a user tries to upload a file named "Zdjęcie 10.jpg", the method verifyFilenameAgainstDenyPattern returns FALSE even though there are no control characters within the filename. The preg_match call in the method is missing the "u" modifier.
Am I missing something or are there any reasons for this behaviour?
This happens only on the live server (Mittwald PHP 5.6.10), and I can't reproduce this behaviour on my local dev system.