I spend some hours to integrate wordpress on my indexhibit.
For people who has 'double' scrollbars appearing on IE and Firefox, you have to check two things :
_ in the indexhibit css file, the div containers (id=content & class=container) must have top and bottom padding and margin equals to 0
_ there must be no tags enclosing the iframe embed, so maybe disable process html (I delete it directly in the database).
Hope it Helps..