Facebook is now keeping all uploaded photos at 720 pixels for the longest dimension, instead of 604 pixels. This 20% increase will improve the quality of Facebook photos, allowing users to create better quality photos and projects from images uploaded to Facebook.
This increase means that Facebook photos can be used in StoryBook Creator for projects with photo openings up to 3″. Quality may be reduced if the longest dimension of the photo is larger than 3″.
At Infotrends last year I learned that 70% of Facebook users do not realize that Facebook saves only a low resolution photo. With the latest change, the resolution of a Facebook photo is still reduced; it is just not reduced as much. For this reason, the original photo will have the highest resolution and should be used whenever possible.