That warning means that someone is running a very old version of NodeBB's client side code (and simply hasn't refreshed, or hasn't cleared their browser cache). So not to worry 🙂
[Solved] Lavender Progress Loading Bar
I believe the loading bar should have a display: none; when finished loading instead of a width of 0%. It still shows after loading of the site is done. I'm not sure if this was intended or not, but in a UX standpoint, it should be hidden. When you think about it, it still looks like its hanging at 100%.
Very good point, I was actually thinking about this myself recently.
Another option would be for it to fade away into the background.
yeah was definitely a duhsign decision, I do like the fading away idea after a second or so