Is there a character limit on Wygwam / CKEditor?
One of our clients just tried to add a very, very long entry (65k characters or so) and it spit the bit.
Perhaps PHPMemory running out as well?
65k characters is just the limit of a MySQL TEXT
column. You will need to edit the appropriate exp_channel_data
database column (using PhpMyAdmin or similar) and change the column type to LONGTEXT
.