I tried to save my project under a new name ("Save as"), as I often do. However, the screen just sort of blinks; then stays the same and does not allow me to enter the new name, etc.. I have upgraded to the latest version of QGIS. I tried doing this with an earlier version of my project (saved under a different name) and it worked ok. Any idea what's the matter with this file, or what I need to do?
Here is a link to it.
Here's a link to the previous version, which did not have this problem.