The mobile version works exactly like the desktop, no bugs. Only suggestion is making it a mobile-friendly layout.

The links on the left are very small and I usually need to zoom in to make sure I'm clicking the right thing. If you're looking to optimize it, sure there's stuff you could do. But is anything busted on mobile? Not that I've seen.

Note; When I log in, I usually just click the unread posts button. Maybe making this it's own (larger) button that appears above or below my avatar would be nice.