So, somewhere along my linux-ing, I must have messed something up, because on a lot of the settings windows (not all), where there should be a white background, there is a black one. Oddly, though, after taking a screenshot of the windows, They seem to have transparent, not black, backgrounds...
As an example, here's what the "Details" panel looks like:
Here's what a screenshot gives me:
And here's what I actually see:
Thanks for the help in advance!