Oh I don't know. It just looks weird. You know when you do a search and under the subject heading there are loads of posts? Like that. Threads I'm On didn't used to be like that did it? [not making any sense emoticon]
It does look a bit different - they're closer together than they used to be, & there are more of them than before (I think) which is a good thing, but the main thing is the ones we'd clicked before are purple again!!!