I looked at forum - the same problem was a time ago and no matter what version of WP is using.
Whatever, I have a big post (in Windows classic Notepad it weight 64 KB). When I try save it to draft or publish - WP save blank.
I guess that this is limit by chars, not by words. A big part of post is images (about 260+) which are imported from Picasa, via HTML editor of WP post Editor.
Can anybody help me?