Thread:Project:Support desk/Installing extension:pdfhandler/reply

This is likely due to a modification made to the interface message. Check MediaWiki:File-info-size/de or MediaWiki:File-info-size on your wiki (not on MediaWiki.org). Did you edit this one? If so, edit it again and make sure there it has no extra space in front.

Extra space at the beginning of a message renders as a "".

Example.