Blurry Icons after Update 1 on CRM 2015 Online

Hi,

This is a very minor cosmetic nuisance, but we just ran the Update 1 last night, and as a result, some of the area and entity icons are showing blurry (Workplace, Resource Center, Imports, Duplicate Detection, Announcements in the above screenshot). We had never (intentionally, anyway) customized any of these, so I was surprised to see this with the update.

Any idea how to get the out of the box icons to reappear?

Thanks!