Sometimes this happens inline (Comment_56232), sometimes it breaks a paragraph (Comment_56515). I have seen such cases more and more over the last month.
This is actually happening due to a CSS clear float display table property on the last child (DOM element) of the message block. In the example mentioned by @Florian Pircher, the last child is the bold tag (b). There is an :after pseudo selector which has a display property set to "table" in CSS. This is causing the large empty space.
So if the bold tag wasn't there in the last point (#4), the text would have resided on the same line. Maybe this could be fixed by reporting in the Vanilla Forums discussion page.
Edit: The huge empty space is due to the display: table property, and the next lines after a bold numeral is due to the clear float.
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So if the bold tag wasn't there in the last point (#4), the text would have resided on the same line. Maybe this could be fixed by reporting in the Vanilla Forums discussion page.
Edit: The huge empty space is due to the display: table property, and the next lines after a bold numeral is due to the clear float.
This shall be added at the end of style.css file.