It is great that we can change the column header labels in Forms reports so the end user does not have to see our variable names.  However, I have found a place where that does not appear to be possible but is still needed.  If I build a Summarized report with a Type of Table, the Group Instances By column does not allow me to put a custom label on that column's header but instead names it "Grouped By: " followed by the variable name. 

Has anyone found a way to do this or is this just something that will need to wait until the next version?