It appears as if KTLT-test gets stuck at least in certain type of tasks (with radiobuttons). Also, it's possible to select any of the radiobuttons at the same time. Also, OK-button doesn't do anything, so it's not possible to move onto another question.

This problem appears at least in the KTLT-9-suomi -version, don't know if it's present in other versions too.

(few examples attached)