Item Type - Bug
I love using Zotero, however, I am frequently quoting "web pages", i.e. using "Item type": "Web Page". However, this type is cannot be selected using the + sign from the "New Idem, More" menu but must be selected after using any item type (using +) and changing it in the "Info" tab.
The omission of "Web Page" from the list is by design, because there should almost never be a reason to create one manually, and in those rare cases switching the type is trivial.
Start here: http://www.zotero.org/support/getting_stuff_into_your_library