We installed today latest 1.6.5 and are testing it.

Scenario: You have a pool of questions. You place a random question from this pool as well as other questions on a quiz. A student takes the quiz. You then decide to delete one question from the pool.

Result:
1. The quiz does NOT choose the question you deleted (fixed in MDL-8833)
2. The Problem is with the "ADD XX Random Questions", which still display a total of 8 questions in my category, although 5 out of 8 are questions "deleted". If I choose "ADD 5 RANDOM QUESTIONS", the quiz will show in Preview "The number of random questions required is more than are still available in the category!" for the 5 missing random questions.

Solution:

To make "ADD XX RANDOM QUESTIONS" show in the drop-down menu only the VALID undeleted questions only.

Currently, the drop-down menu shows the TOTAL number of questions (deleted and not deleted) in the category