[BUG 1.1Beta] Importing a new terrain heightmap crashes the world editor - RESOLVED

I tried importing a new terrain heightmap, when i saved the level then restarted the world editor from Torque Toolbox the world editor crashed.
I tested the same procedure in the alpha with no problems.
I tried exporting the heightmap from the 'empty terrain' default level and then importing it and saving the level, again the world editor crashed on restarting.

Steps to reproduce:
- Create a new 'Full Template' project
- Open Empty Terrain in world editor
- Export heightmap
- Reimport exported heightmap and save level as 'broken.mis'
- Close world editor and Torque Toolbox
- Open Torque Toolbox
- Select broken level and click to start World Editor
- Crash

If you load the world editor with the empty terrain map, then load broken.mis from the menu you don't get a crash.

System: Vista 64, 4GB RAM, GeForce GTX 260