I'm not sure what's considered a "very large forum post", but I have a thread in the forum where I post a table of XP updates after each session. It's now at 42 x 5 rows, mostly just numbers, so I don't feel like this would hit any limit unless it's something to do with it being a table (html size?). The first post in the thread is the table, which I edit each week to add in the latest session. Before the update, I'd select the table and copy/paste the new table into its place. This still works, but upon saving, the table isn't actually updated. Thankfully, the new editor is better with tables and I've had no problem manually adding a new row and adding the numbers, which then updates on save, but for some reason a copy/paste doesn't seem to trigger the 'dirty' flag or something, maybe? I also put a graph of current experience after the session as a new post in the thread in order to 'bump' it and let my players know it's been updated. Since we've now reached 38 sessions and there were a few other posts in there, it's become paginated. I decided maybe I'd try creating a completely new thread called 'Party Experience 2', but I ended up getting errors when trying to save. I'm copy/pasting a table from Numbers on OSX. The table looks fine in the editor, but I got an error hash multiple times before giving up: cd0e31976f32468e81680c74d360823c 8724b8c3cb5f4c409c345f749cac6361 f770642925ae40f285c307e663b3098b 47f08da5187c44caa17c081b2fa8b089