Has it something changed in the latest release?
I'm having trouble selecting and assigning materials now.
I can easily select and assign the first material, but then I've issue selecting and assigning other materials.
For some reason the dialog window keeps showing me the first material as default selection and it seems I can't select others materials. After random clicks, it seems it finally accepts my selection and applies the material.
Here's a screenshot of the issue:

In the screengrab above I'm actually selecting the grid material, but as you can see the selection is still on the box.
Only an outline appears, which doesn't give me the idea I've selected the grid material.

