When a post is taller than the viewport, the bookmark icon doesn’t get updated to indicate it’s been read–even when a post after it has been marked as read. Most recently, it happened with a topic post in Chrome 27 on Win Vista, but I’ve also seen it happen with replies and in Firefox release. Navigating away from the topic and returning correctly shows the post as having been read.
This has been around a while. Still an issue?
I’ll have to test it out and report back.
I am closing this for now, later this week we plan to have a “read” indicator. If this is the case I am fairly certain a new one of these puppies will pop up quick smart.