Try this to get anything using IconSupport to work. Been using it on 7.1b2 just fine.
Hey guys, I have an iPhone 5S running the latest beta and normally when I had installed a tweak to change the grid size layout, it won't work due to iconsupport being incompatible with b1, b2, and b3.
At that point I tried contacting all three developers that made the tweak and they said that they won't update it for the beta, because its a beta. Which is understandable and I respect their decision.
Since this was a major downfall for me I went under a little investigation which resolved in me discovering a method that works!
1. I installed both iconsupport and Iconoclasm (paid for)
2. Then went into iCleaner Pro, press the "+" key on the bottom left, then pressed on "MobileSubstrate Addons" and scrolled down till I reached "IconSupport".
3. I then hit the toggle to disable it, needing a respiring to take effect, then after that it works flawlessly!
I tried couple different layouts and all of them work fine. Tested with two iPhone 5S' running 7.1b3.
**I tried using this method with HomescreenDesigner (paid for) and it still doesn't work at all. It just gives you four icons on the top row per page and no changes will take effect.
So far my phones been running normal with it disabled for acouple of hours now.
Thought I would share it with you guys, I hope this helps you guys out!
Edit: I just tried rebooting my phone and the layout has stayed the same.