gThumb 3.2.1 Fixes Facebook Authentication

gThumb 3.2.1 is a bugfix only release, which repairs the broken Facebook authentication, fixes audio playblack in slideshow mode, and fixes the spin button width for the file size control in filter-bar.

Moreover, the ability to modify bookmarks has been repaired, as well as the –disable-libjson-glib configure option, which was unrecognizable.