Recently all my icons are highlighted, as if they had been selected. When a new icon is created, it is not highlighted, but as soon as the cursor passes over, it becomes highlighted and stays so permanently. What causes this behavior? How can it be stopped? A jpeg of the problem is available at
https://drive.google.com/open?id=0B96WA ... zlDSFVPSzQ
If anyone can tell me why pasting this URL between "[img]and[/img]" fails with a message "unable to determine dimensions...", that would also be welcome.

Thanks for your help - jon

Maybe it is the Bug 377441 - When hovering a file it does not unselect : https://bugs.kde.org/show_bug.cgi?id=377441

Great! Thanks a million for your reply!

Fixed in version 5.8.6