So, I've come across a bug I haven't seen in 3 years of using RPG Maker VX Ace. My lights, which once looked like this:

Now look like this:

This has happened with a handful of other items, all in areas with an alpha channel getting completely filled in (that is, the program isn't recognizing the channel). I haven't changed the resource though.
I've added some amount of scripting, but nothing that even comes close to dealing with graphics rendering. So while in a very stretched theory, yes, I could've done something tragic with my code, let's assume that's not the case for now. I've also added one of Modern Algebra's message window scripts, but I didn't notice this change immediately after that.
Has this happened to anyone else? Does anyone know where in the script I might be able to pick apart rendering the alpha? (Or is that handled in the .dll?)
Basically, any suggestions or guidance would be TREMENDOUSLY appreciated.
<3