Comment 5 for bug 486381

The sections "Favorites" and "Files & folders" of the launcher do behave normally. This bug only happens with launchers of the other sections (say, "Games" or "Accessories"). This seems to be related to drag-and-drop. Try to pick and move an icon which is in the "Favorites" or "Files & folders" section (say, the "Desktop" icon): it's impossible. Try with an icon of another section (say, "Sudoku" from the "Games" section): you can drag the icon, though (apparently) nothing happens when you drop it.

This bug happens when your mouse is not perfectly still while clicking a launcher in any but the "Favorites" and "Files & folders" sections. What actually happens is a tiny drag-and-drop.