Posts over 65535 bytes get cut off at 65535 bytes. If that makes the BBcode invalid in certain ways, then you get the INVALID BBCODE error.
Also, note that a byte is different from a character. Because SMF stores "special" characters in a particularly space-inefficient way, each Russian character uses about 6 bytes, and each line break also uses 6 bytes.
by the way theymos, i would wish to know something about, because some of the people writes more than 65535 bytes, for an example:
https://bitcointalk.org/index.php?topic=948965 which had to use two posts to complete his content.
are there any plans to increase the byte limit to let the people make a more detailed reply or something?
maybe we can impose a hidden post policy which is applied to the long posts, which is not loaded without asking permission of the thread reader.
