There appears to be a little concern that yesterdays update on Warner's July releases listed Key Largo as being framed at 1.85:1.
This is a little concerning since the correct ratio should infact be 1.37:1 - basically, the disc should be full screen. I am hoping this is just an error in the press material, but first thing Monday I will try to get an answer out of Warner themselves. I don't think there is any need to worry - the Region 1 release was framed correctly and it is almost certain the Region 2 disc will be identical.
Thanks to John Howells for alerting me to this problem.