Most links have been working fine for me recently, although I still occasionally see this error. However, it appears that links to kbin magazines don't work at all. I suspect Connect is searching for server/c/community and not retrying with server/m/community when it gets an error back.
I think they just get marked as deleted, and what is supposed to happen is that the deleted comment gets picked up through federation and the destination server should delete their local copy. Sounds like that isn't happening between Lemmy and Mastodon.
There's some I haven't used, but Kbin will do Mastodon-style microblogging and Lemmy-style threads, so that's the best of both worlds. I don't think the private messaging function works on it yet though.
This was a great little game, I got it off a magazine covertape (I thought SU but spectrumcomputing suggests it was probably Crash). I didn't necessarily think it was innovative then, but the race mode was fun and I remember changing the UI colours. In fact, I don't remember there being a non-race mode, so obviously didn't go into that bit of the game much!
The dev does plan to open source it I believe.