I like to use the "New Posts" to find ones since I last viewed.....however I find it inconsistent since the new change....

Here's a work around if anyone is interested...

Click the "Mark forums read"

Then click "New Posts"....a window comes up saying nothing found but you can find the last 24 hours new posts by clicking on..."here".

Then you just read the ones you want.....or that you missed.....I don't like to wade through each forum category