(And yes, I know, they aren't necessarily finished yet, but I migh as well include them)
1) Dark mode chatrooms still unfinished on DSi. I brought this up in an erlier post, maybe it's planned to be fixed, but yeah. The chatbox is white.
2) In dark mode (DSi, Ninja), the text shadowing is dark, which looks kinda ugly. White (1x1x1 px) or some other brighter shade seems to look better, for me.
3) May not be really important, but regular users can access Ninja. Not the core function or the chatroom, but they can see the window and speak in Mario from it.
4) Page scaling isn't correct. I'm not sure wht the correct dimensions are, but the chatrooms are "taller" than they once were, larger than the DSi's view.
Only one I know is using the same URL (/chatroom/ninja.php?id=Ninja iirc). As I said before, it doesn't access the actual chatroom, unlike Waldo's method.
Dan is aware of 1 & 4. They're planned to be finished. however, I'm not sure if Dan knows about the other issues listed here so I'll forwrd them over. Thank you for reporting these.