color issues

I had exactly the same thing happen to me. I had just installed version 4.24 rc1. I fixed it by going to the Colors section of TLB settings and selecting Background Colors in the Toolbar Colors section (colors don't matter because I don't actually use them). Can't remember if I chose Apply on the colors I chose, but I then reselected the default setting (the gray box with the red diagonal stripe) and the colors now matched my toolbar. This was a new installation - not an upgrade - because I had just reformatted my harddrive.
Hope this is useful in finding the problem.