Do things other than these images you’re downloading also look any different? Text on websites sharper or more blurry?
Do old downloads still look the same to you, or have these somehow degraded in quality when you weren’t looking? Look closely.
Thus the lateral thinking answer: Check your screens and your eyesight. One or more of these may have a defect. Or an improvement for that matter. New glasses?
Do things other than these images you’re downloading also look any different? Text on websites sharper or more blurry?
Do old downloads still look the same to you, or have these somehow degraded in quality when you weren’t looking? Look closely.
Thus the lateral thinking answer: Check your screens and your eyesight. One or more of these may have a defect. Or an improvement for that matter. New glasses?