Please have a look at the screenshot. To me this is not a duplicate of 06023. The shown validation criteria (sprintf..) look very much different from expression manager code. Furthermore, the validation criteria in the example questionnaire are only set for the "age" question but are shown 3 times, also for other questions.

To me this looks like a bug. If it is not, sorry for my ignorance. Is there a way to get rid of all this cryptic text in data entry mode altogether?

It is autogenerated expression manager code. There is currently no way to get rid of this.

Sorry for reopening this again...really don't mean to bug you...but...

1. There is no problem in the print version with the validation criteria of this question. When printing there's a perfect text (in german): "Every answer has to be between 6 and 18". The problem is only in data entry.

2. The cryptic text is shown 4 times in total in data entry. First time for the question were the criteria "answer should be between 6 an 18" is set. But also for the three following, totally unrelated questions of different question type (see screenshot).

Fix committed to master branch: http://bugs.limesurvey.org/plugin.php?page=Source/view&id=11160

You are right about that - these should not show up on the following questions and this is fixed now. For the rest this will be fixed in 2.1.

2.00+ Build 130115 released