Connecting Flickr to GalleryNext, however, worked just fine. Your experiences connecting with the CyanogenMod beta may vary.
GalleryNext is a slick looking app and will be a welcome addition to the CyanogenMod ROM once it's ready for prime time. If you're tired stock Gallery app and the G+ Photos app isn't your thing, join the CyanogenMod beta and give GalleryNext a try.
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