ValueError: image should be a GdkPixbuf or empty about gmapcatcher HOT 5 CLOSED

It seems that we might be missing some validation in the tilesreposfs.py

I'm assuming that this "Errors occurred" message does not come up every time. 
- How often does it happen? 
- Is it always around the same location?
- If you do not get the "screen abruptly turns gray" do you still get the error?

Thank you for the report

Right, it doesn't happen every time. I believe it only happens in association 
with the 
screen turning gray. If I zoom in on a location (e.g. Antarctica) which I don't 
have 
cached (so that the screen turns gray, but not even unexpectedly), I see that 
error 
when exiting.

I redesign load_pixbuf it should take care of this issue...
see r363 & r364