There is a work a workaround for this but it is hideously complex and a dead end for non-programmers.

http://docs.limesurvey.org/tiki-index.php?page=Workarounds:+Question+design,+la yout+and+templating#Multiple_question_types_in_array

This type of question is critical for many of our research surveys and invalidates LimeSurvey as an option.

Implementation of the workaround in a user friendly fashion would place LimeSurvey as one of the very few online survey systems that offer this feature (only one survey system out of just over twenty investigated so far).