My requirements bind me to have multiple rows in a single \"Details\" band.
Right now I am having a static text field (which is highlighted in color) in the leftmost
In my case doing as you advised didn't work. I had to modify your solution a little bit - I made a "frame" instead of grouping objects, and put previuosly grouped elements in that frame. I set positionType="Float" and stretchType="No stretch" in that frame, and set stretchType="RelativeToTallestObject" to its child items - then it all works.