About data consumption: The only thing different from 0.0.29 that I might think is the automatic download, and maybe in the previous version you weren't clicking "View" on all images.

So if you don't have unlimited internet access I would suggest to go to Settings and disable automatic download (setting it at 0 bytes) so you have to click "Download" in every media file you get.

Besides that, there hasn't been any change in protocol or something that would create more data consumption.