Fullscreen and splash window (ie borderless) support is in. I ran several systems overnight with a script which flips between fullscreen and windowed every second to ensure there's no threading issues with the new code.
In the process I generated this great mistake, basically what happens when you don't clear the background while rendering the collision blocks. We're going to have to do more complicated mojo to make splash windows "transparent".
Overall work on the engine is on-track for Beta-2.
Now on to dynamic text textures