Thanks for fixing embeds! Although now I'm getting a different issue where the site thinks all youtube links refer to the same file so you can't upload more than one per thread…
And I'm pretty sure the bug with >>21
is due to the overboard. If there's a thread from, say, /lounge/ which references post 12 in /lounge/ - has >>12
in it - then if it's visible on the overboard front page then the overboard will think that all posts of number 12 are being linked, regardless of which board it is (so post No.12 on /hell/ will be backlinked to whatever number /lounge/ post in the overboard, but if you click through to the thread or use the actual board it won't be).
If you search the overboard for No.14 you can see a post on /silicon/ that contains >>12
, which is where the backlink on the /hell/ post comes probably from, for example.
This didn't happen too often on old sushichan because there was a reasonable difference in post numbers between the different boards (and I think the two posts have to both be on the overboard "front page" for it to happen), but I did notice it occasionally so it wasn't a problem Itamae or undoall ever fixed. As post numbers increase and the post ranges differentiate between individual boards it should start to happen less often.