Dear ILIAS-Admins

Due to a quite old bug #0012860 storing 4-Byte-Characters (such as Emojis) to the Database lead to losing data since MySQL just stripped away all text after such a character. Therefore the ILIAS society funded a filter in the database-layer which filters those characters and replace them with a „?“. The Bugreport is https://www.ilias.de/mantis/view.php?id=12860

This fix now has been published in 5.2, 5.3 and trunk. 

This fix does not restore already corrupted data in the database since this is not possible. E.G. broken Wiki-Pages which are inaccessible still will be broken after updating. The fix just prevents from breaking more content in your ILIAS.