Beta.curriki.org--> Clicking on "Create a Blog" button throws Error. ( for a normal user)

Beta.curriki.org--> Clicking on "Create a Blog" button throws Error ( for a normal user. .eg: username : gowri, password: curriki).
Bug confirmed in MAC Safari, windows IE 6 & 7.

For Administrator, it is noted that under blog tab, the button name is "Add an Entry" and he is able to add a blog.

Error : Error number 4001 in 4: Error while parsing velocity page Members.MyBlog Wrapped Exception: Invocation of method 'createSpace' in class MyBlog threw exception java.lang.NullPointerException: Cannot invoke method getDocument() on null object @ Members.MyBlog11,11?