Toot! v1.4.1 is out! This is just a quick bugfix release.
https://itunes.apple.com/us/app/toot/id1229021451?ls=1&mt=8
What's new:
* Instances running Pleroma should now work again. You may need to remove and re-add the instance, or reinstall the app, to make sure everything goes back to normal.
* Zooming should work again on images now.