I've been quiet on this thread recently because after buying the full version and installing it on a different server the problem never occurred again.

Reading the threads here, I looked at the cookies in my browser and there were several other cookies named 'lang'. I think they all came from different copies of phpmyadmin and they all evaluated to 'en'. phpmyadmin is not installed on the server with the full version I bought.

Do you think this was the cause of the problem.?