This update does the following:
1. Fixes Vive controls so they are less buggy (including left handed mode)
2. Lets you zoom by grabbing with both hands
3. Water source blocks look different (this was a bug) and can no longer be destroyed by plants
4. Plant source blocks can no longer be destroyed by fire (otherwise a plant source block makes no sense)
Thanks for all of your feedback so far! As always, let me know if you run into any bugs and I'll fix them ASAP