In the new ubuntu, when I move files in the GUI, they are copied by default. If you want to move them or make a link you need to press the Alt tab. This behavior is very strange, nobody is used to it, and is prone to errors and duplication of files. How can the default be reverted to the normal thing?
The default operation when dragging a file to somewhere on the same drive as the original location is to move it. If dragging between drives, then the default is a copy operation. You could drag the file using the middle mouse button instead of holding Alt to be given the option.
These settings are the same as previous Ubuntu releases as well as on Windows.