Hi,
The problem is that you should not use artisteer-swirly1 or artisteer-greenlagoon for creating skins from Artisteer 2.4. As indicated in the documentation about using Artisteer, those skins only work as a starting point for Artisteer 2.3. We have new skins that should be used as the starting point for Artisteer 2.4.
The main issue is that the Artisteer CSS classes are now all lower case in 2.4 like art-jeader-png not art-Header-png (like in Artisteer 2.3) and since CSS is case sensitive the old CSS classes will not work.
Make sure you upgrade to mojoPortal 2.3.4.1 and then re-do your skin using one of the new artisteer-24* skins as the starting point.
Hope it helps,
Joe