6tag vs Instagram BETA

After having tried out Instagram BETA on my Nokia for a couple of months I decided it was time to go back to 6tag. I began with 6tag but due to some crashing and in my mind a more difficult user interface than Instagram BETA I switched to Instagram BETA. It worked fine except that it was often very slow on wifi. But the last few days it stopped sharing pictures to Facebook. I have no idea why because on Android it works and on 6tag it works. So back to 6tag.