Have you tried reloading after posting? Sometimes my browser doesn't show my posts (or any recent changes for that matter) until I reload the page
Try restarting your browser or right clicking and reloading the frame. You can also try removing frames and reloading the page.
Our caching still doesn't always work properly. I need to try fixing it again.
Yeah, the same thing happens to me too sometimes, when I'm using my computer (which I'm not using right now).