Nope I'm on Win7 desktop PC, using Chrome browser. Sometimes people's posts (including my own) show up with the weird scrollbar, and sometimes they don't. Based on my very limited testing it does seem to be related to whether I do a quick reply or normal reply, so I'm guessing that that's the reason I'm seeing it in general for other people.
YES about the 'like' button @Former-Member - it often seems to take up to 4 slow, deliberate clicks on PC w/ Chrome to actually register a "like". Agreed that it seems much more responsive on tablet, although I hardly ever use my tablet so can't confirm much about it.
I also keep meaning to post screenshots of what happens when I try to attach an image to a post on PC w/ Chrome, where half the text goes off the window.
Initial screen: Content is left-justified in the little window, and is cutting off content on the edge to the right.
Scenario 1 - uploading a file from my PC: same behaviour as above, overflowing edge to the right.
Scenario 2 - uploading an image from another website. The moment I paste in the link to the image... : Content has realigned itself to left-justify at the start of the text box... Losing anything that was to the left.
Wouldn't it be a pity if my link was invalid and I tried to load it, and wanted to see the error message... Since it's off on the left side of the screen and therefore not visible.
Thanks @NikNik,
Both the quick reply scrollbar and the image upload things appear to be fixed 
High fives to yourself and to the tech guru 🙂