[rt-users] missing content search?

[Benjamin Reed]

Perhaps I'm missing something, but other than custom fields, the search 
page offers searching the following things:

# Owner is
# Requestor email address
# Subject
# Queue
# Priority
# (Created)
# Ticket attachment
# Status
# KnowledgeBase Entry

...how do you search the contents of a comment or reply?  Is that part 
of "Ticket attachment"?