This is a little weird color scheme between the bold, dark blue, and light blue
as far as what has been viewed and what not. If I click on a Bold dark blue
unseen thread to read it, then go back out to the thread list, the title will be
dark blue not bold(but has been read/seen). If I click on the same thread again
with no new posts(dark blue at this time), exit back to the forum list and now the thread
title is light blue.

Glad I'm not the only one.
To add to that, my point was that previously it was VERY easy to tell which threads I had been to and which I had not. If you take a quick glance at the picture above you might not catch it.
TLDR: You should be able to figure it out if you're drunk 





