It doesnt seem to work with body field that is available in all text areas.
Am I missing something or is it supposed to be this way? Is there a way to make it work?
jWysiwyg should work with any format enabled textarea field. Can you think of something which has been done to the body field and not the others?
Are you using a custom theme? If so, does it work with a default theme?
Have you tried with Wysiwyg 6.x-2.x-dev?
Without further details about the problem I can only close this issue. Please re-open it if you can provide the requested information.
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