Problem with the Upload of Zip Archives

The latest Joomla! versions use increased security checks when uploading files which cause occasional problems when uploading zip archives (Batch Upload). There is the possibility to just remove these security checks, but we don't want to do that unless this problem turns out to be critical for many users or the workaround below does not work). If somebody encounters this problem on their site please post in our forum or here or here on GitHub.

After some tests it turns out that it is easy to work around this problem by just zipping the image files with a different zip program.

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