The portcullis (main door entrance) to the Slayer tower near Canifis seems to be glitched on the HTML5 client. Clicking the portcullis registers no action, but I can simply walk through it to get inside. In fact, I walk over the portcullis when passing over that space which is a graphical glitch.
System: Intel 4000 HD Graphics, 8GB RAM, Arch Linux system using the latest Google Chrome from the AUR (google-chrome).
Additionally, the (RS3) camera gets a little funky when I stand near the portcullis and spins around a bit due to the high arch above the door.