Nickolas,
Hi. We are working on a number of enhancements and bugs for 2.4 and many of them relate directly to some of the things you are mentioning. The bugs we have found are related to changing certain question types (usually editing a question for example and changing it from a dropdownlist to a radiobutton or checkbox, etc...).
As far as the line breaks I would make sure you do not have anything entered in for question header/footer.
V2.4 will be out before too long, we are spending a great deal of time testing this release and it should be a very solid release.
-Chad