I mentioned a gap in the username usage that didn't show up in the comment I posted (it's on your post itself with alierak and the gap between the userhead and name) but I hadn't noticed it anywhere else until I did an update on a page in my journal.

Here you can see all the gaps on every username mentioned and it's a huge one and very jarring. I know that another dev mentioned that it probably happened in the roll back from the inbox and that's why the page number boxes are stretched/there's the parenthesis gaps, but when I tried an @ on the comment itself as a test, it didn't show up. I don't know if it's only in reference to @ that it doesn't do that or if this is a user name code issue, but I wanted to add in that it's an issue and still ongoing. Thank you :)

Edit to add: that I finally used my brain and noticed that the usage in my comment isn't in a ul/li format like it is in your post and in the page I linked in question. So it seems to be a table thing.