I will look into it further. I have a suspicion it is the way I am handling the background images but not sure. If you want you can try resizing the background images to a 4:3 aspect ratio and see if that works. The image I am referring to is the bg.png in each of the system folders under the nbba theme. I will not be able to try this until tonight. If that does end up working I can provide better resolution background images for a 4:3 display in the next update.
ignore that. The issue is the filter being applied. To fix open the main theme.xml and change
<image name="filter" extra="true">
<path>./../nbba theme/main/filter.png</path>
<pos>0 0</pos>
<origin>0 0</origin>
<size>0 1</size>
</image>
to
<image name="filter" extra="true">
<path>./../nbba theme/main/filter.png</path>
<pos>0 0</pos>
<origin>0 0</origin>
<size>1 1</size>
</image>
Changing the size from 0 1 to 1 1 will force it to fit the screen so it will not carry over to the next theme. Another change I will make in the next version is
<image name="background" extra="true">
<pos>0 0</pos>
<origin>0 0</origin>
<size>0 1</size>
</image>
to
<image name="background" extra="true">
<pos>0.5 0.5</pos>
<origin>0.5 0.5</origin>
<size>0 1</size>
</image>
This will make the background center on the screen instead of cutting off the entire right for 4:3 displays.