When user does a screenshot, there is a delay before it appears on the desktop, it normally appears once he has deleted something else.
Also, if user drags a file from an email or somewhere else on to the desktop or in to a folder, it again does not appear straight away, but will after some other form of action is taken.
This has been observed on couple of Macs: 10.10.5 and 10.9.5.
We have older Macs that do not have this problem.
Do you have any idea what may be going on there?