I think we have the following options for 8u60, since anything else seems too risky given that we are running very short of time for 8u60:
A) Do nothing for 8u60 and address this issue in 9
This will lead to blurry text when run on systems with the Windows scale set to 125%
B) Set the default threshold to 150% leaving the default font unscaled even when Hi-DPI not used (that is, don't fix
This will resolve the blurry text when run on systems with the Windows scale set to 125%, but applications that use the default font size or use controls sized in ems (which they are with the default Modena CSS style) will now appear smaller than they were with 8u40. This smaller font size could be perceived as a regression.
C) Set the default threshold to 150% and scale the default font when Hi-DPI is not used (that is, also fix
This will resolve the blurry text and revert the behavior when running on on systems with the Windows scale set to 125% to that of 8u40, but has the (existing) oddity that controls and default font are scaled whereas images and graphics are not.
The only other option I can see is to set the default threshold to 200% (with or without fixing
) but that seems extreme.