For now in your config-int.php file turn off the extra vb3 enhancements and WYSIWYG stuff and just leave on the vb3 regular integration
Copy the regular templates directory back to your install.
If you want hints on html code you can read up on w3c.org as capitol tags have not been used in 3 years in html. There is a validator over there that should tell you exactly where the mistakes in your html are and guide you to fix yours.
There are two outstanding issues with the VB3 enhancements we are looking into one in relation to the smiley's for VB
CMS users and another with the java thing on showphoto so no matter how much we shape your code up to see where your site and our code are meshing nothing is going to fix that java thing till we come out with a fix for that so its best to turn off that extra enhancement till then.