Hello
I would suggest you contact your host about any white page issue as it would appear maybe a server issue white page that is. You can send me an ftp login to look at your files but trust me before I respond to you I have tested anything you have reported from my test site. There are no scripting issues so the result would be to see what server conflicts there might be that would cause that admin issue.
On your javascript thing if you turn off your enhanced
vb integration does the box work? if thats the case then the contact for that issue would be some mod or code in your
vb header that is causing your conflict. Maybe something to do with the custom site style.
You can most definately edit and delete a comment. On the right bottom side of the comment display is an EDIT link and you can edit or delete each comment as you see fit so no issue there.