This is a known issue, one that I haven't got around to fixing yet... Have you noticed the number of minor bugs I've had to fix recently? :P
Plus, every time I fix a bug, I risk introducing another, and this behavior is well known by all programmers. I tend to prefer going ahead and back again when I find a problem. If I do it a few times (back and forth, back and forth...), I'll end up realizing what the problem is and explore another solution.
In this particular case, the issue is due to the fact that Wedge.org originally showed no topic titles beside regular posts, instead only showing them when they had *changed* in the first place. Which makes the HTML shorter and makes it most likely that everyone will notice the title change in the middle of the topic.
Problem is, I never really discussed this, and just left it "the way it is in SMF" for Wedge, not really bothering about title lengths. I want the post header to be as short as possible, so it needs to be kept in a single line. You have no idea, really, no one has any idea how much time I spent on this in the past, before simply moving on to other things, hoping I'd find a better solution later. Technically, I'm using a table display on the buttons, but the behavior is often irregular depending on the browser. This was also one of the reasons I added the Action menu, so that the line would be as short as possible, but with Pete's last-minute addition of the Like feature, I decided to 'let it in', instead of hiding it in the action menu. As a result, well... You can see it, the line is longer than I used to have, and thus my Weaving layout is a bit broken by it.
I'll come around to fixing it... But I have other priorities right now.
Please give me about a week to fix *everything* as best as I can.