Not sure if this has been covered or not. But when I went to change the limit for how many text t store in a conversation it was black text on a black background. The white theme did not seem to be applied there.
Also the only way to change the number is to scroll which works well for a bit but changing from 500 to 100 took a little longer than was fun. Not a big issue though.
The color thing does make it hard to see though and seemed odd that the theme didn't match.