I have to agree. In the All Topics list, the icons to the left are tough to read and underatand. I liked the blule balls, ti was eay for me to tell if I had read a thread or not. Also, the closed topics one is difficult to notice at first. I liked the word "Closed" across the thread title so it was unambiguous.
When I click on the blue arrow next to the threads in the "All Topics" page to go to the last read message, it just takes me to the last message, especially if the last time I read the thread was a couple days prior. I noticed this most after the most recent redesign of the buttons/icons. Was there something else changed besides just the icon?
Is it possible it's just a time stamp issue? I seem to recall you fixing an issue with that about the same time you changed the icons, so maybe your fix broke something else? I'm just Arm-chair programming now, so feel free take or leave this.
I don't know if this is what you mean but...I have found that when I'm responding point by point to a post, it sometimes will paste the entire post I'm responding to in the writing pane, even if I only copied the portion I'm replying to. This can be very disconcerting if I don't notice it right away and either preview or post, then find the entirety of the post I'm responding to in the middle of my own post.