4
Now i understand your issue.
it is because the content field is "TEXT" and its length is limited to 65,535 bytes ~64kb.
TINYTEXT 256 bytes
TEXT 65,535 bytes ~64kb
MEDIUMTEXT 16,777,215 bytes ~16MB
LONGTEXT 4,294,967,295 bytes ~4GB
you need to use MEDIUMTEXT or LONGTEXT instead.
Alter table newblocks
eg:
ALTER TABLE PREFIX_newblocks CHANGE content content MEDIUMTEXT;
PREFIX is your xoops database prefix