Caffeinated Content keeps putting code in my posts!

Hi Everyone,

I am using caffeinated Content to post on my blog, but I keep on getting this text before the actual content on the post:

{rtf1ansiansicpg1252cocoartf949cocoasubrtf270
{fonttblf0fswissfcharset0 Helvetica;}
{colortbl;red255green255blue255;}
paperw11900paperh16840margl1440margr1440vieww9000viewh8400viewkind0
pardtx566tx1133tx1700tx2267tx2834tx3401tx3968tx4535tx5102tx5669tx6236tx6803qlqnaturalpardirnatural
f0fs24 cf0

Does anyone know what this is and how can I prevent this?

Thanks!

there are some reasons for this happening:

incompatible version of wp.
remove and reinstall caffenated content.
maybe cafenated content is interfering with some of the other plugins.It does not work with some plugins.