Images edited in Photoshop, then saved as JPGs are unsharp when viewed at 100% in Bridge 15.0.1.412. 100% previews saved in cache.
Purging cache temporarily eliminates the problem, then editing another image results in a repeat of the same issue. Purging cache again clears the problem.
Images are typically saved at 6K.
I haven't seen this issue with previous versions of Bridge.