One of the changes the implemented on the Vincent theme is a very small text box that tells you where the last post was when you last viewed the thread. But it’s dark red font inside a small black box, against a dark blue background. It’s nearly impossible to read. Can you see it? In between the two posts, it says “last visit”.
Personally, I would have much rather seen the bolding problem fixed. In this theme, bolded text is actually smaller and ‘thinner’, but very similar to the rest of the text. When someone bolds something, I won’t notice it, unless they say something like ‘bolding mine’ and then I can find it, but I have to look for it.