CaveEditor Background Behaviour Issue Solved!!

I was under the impression that this issue was fixed in the 99 builds, but the traditional workaround is to not use the "New Map" feature and instead to use Copy Map, and then change the background and all other attributes.

I am. However it is highly probable that I will still run out of slots. I've taken to swapping out all of the interior rooms with 94+ slot rooms. :\

Is there any inkling of a solution (to fix the 94+ bg issue) in the remotely near future?

 

That was the solution.

Step 1: delete all maps that have broken background (maybe you can salvage the files if you're smart)
Step 2: use "Copy Map" a bunch of times on maps that have working backgrounds
Step 3: you now have more maps to use.