Hi,
In 4.8p3, I just discovered that save button in top menu bar does not prompt for a filename after a new map has been created.
map is saved automatically with its default name “Untitledx”.
So, to reproduce:
-Create a blank new map
-Click on Save button on top menu bar
*You will now see that map is saved, but with no option to choose location or filename.
If the “Save All” command is used from content browser menu, filename prompt opens and one is able to name map and sace it to a specific folder.
Cheers,
Klaus