Don't ask how I came across this one, it's a strange one, to reproduce,
This only happens in Firefox as far as I can tell,
Open a topic via ajax from a category, close the tab with ctrl + w or with the X on the tab, press Ctrl Shift & T to reopen that tab. Hold the back button on the browser and click the first link that takes you back to the category where you came from.
You get this:
However the URL is that of thr category.
It actually looks quite nice, but should probably be an option if people ask, and not a bug. (Would tie in nicely with the related posts issue that's on Github)
Are you editing the .css files? If so then that's your problem - you need to edit the LESS files:
Ohhh, I have read several times that it´s made with less... Thanks.
When you create a thread, it is supposed to show the actual text in the thread on the teaser when Teaser Post is set to "First"
It also does show the text in the teaser, but only when someone comments (It does not show the actual comment text)
Picture to explain:
Teaser before anyone comments:
Teaser after someone comments: