This has just happened to me for the first time. I'm a new player and have been learning a lot from these forums and peoples posts.
I clicked on the population number next to the hourly income / expenditure numbers. I'm guessing thats the population window. I only found it about 5 minutes ago and boom, my curser had gone. Tried exiting the game, got back to the main menu minus the cursor only be totally clueless on where it was. In the end I had to do the Ctrl + Alt + Delete and shut the game down from there. Fortunately I had only just started my city, which is now gone as nothing was saved to the servers :-(
Does this happen every time on the population window?
And last question, is there a keyboard shortcut on the main screen to quit the games and save to the servers?
Thanks in advance :-)
Just a quick edit:- I've tried several times now going to the population panel. Each time the cursor disappears, so I'm guessing that it would be best to just avoid that panel for now.