in draw, impress or calc (i was not able to select multiple objects in writer) 
draw several objects (for example, a rectangle and a block arrow).

select them all and drag them. contour that shows the new location is not shown 
for all objects (in this case it is not visible for the rectangle).

selecting different quantities of different objects results in very different 
results (for example, if there are two objects : block arrow & a rectangle, 
order in which they were drawn affects the income).