joomla/joomla-cms — pull request #4944 by infograf768 (2014-10-28 09:09:45+00:00)
Title: Language Filter Warning: issue #4079

Create a multilanguage site.
Set the languagefilter to
1. Items Associations: No
2. Use Automatic Language Change: Yes
3. Set a frontend registered user to use a specific language in frontend
4. Display the site in another language
5. Login with the user

before patch you will get (see #4079 ) "PHP Warning: Illegal string offset '*' etc.)

Patch and test again