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I'm not sure, but it could be that you're calling the images without the <$xoops_imageurl}> tag, but directly from the /themes/insightexec/ folder. That's just one thing that I noticed.
However, you might want to check with the hosting provider is they have made any changes, causing the open_basedir() restriction to kick in... We have seen that problem before, but I don't know the solution, or the cause.
Herko