Same here. I had a long post I made a small edit to, and it just wouldn't post. Kept going round in a loop. I copied the text to wordpad for safekeeping, but it just wouldn't work. I deleted the post and tried to re-post, but it's just going round and round. Click submit, do captcha, taken to blank reply box. Paste, click submit, captcha, blank reply box. Managed to get a small test post. I'll try the longer one again later.
Had a similar problem with a smaller post earlier. In that one I was quoting. Took the quotes out (as others had suggested), and it seemed to work. I wonder about the efficacy of a spam filter that triggers more with quote-posts, or triggers at all when editing. Does it actually work? Would there be a lot more spam without the filter?
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Of course, it's probably quite a bit more complicated than that.
You know sometimes, between the dames and the horses, I don't even know why I put my hat on.