"CoInternetSetFeatureEnabled" wasn't found in the urlmon.dll

urlmon.dll is a part of IE and us use in conjunction with setting security levels. It's also used with a browser control embedded in an application which is apparently what Poser 8 is doing. The message is telling you that it can't find that patricular function in your urlmon.dll. According to Microsoft, the function was added as part of the security updates with XP Service Pack 2. If you're running XP SP2 (or I assume Vista) with IE 6 or above, it should be there. 

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken