The phenomenon seems browser-independent (tested with Konqueror, Mozilla, Opera in several versions) and is also not remedied by renewed logging in and out. A workaround consists in switching the display via the filter function show last 4hrs/24hrs to 24 hours, 48 hours or a week, in order to find newly added posts in a targeted manner. A pure solution through a browser change or browser update brings no improvement. With the admin, an error message with screenshots should be submitted, since the problem could not be systematically reproduced in this form.