Interesting that several of the top seeds (Mauresmo, Sharapova, Davenport) dropped the first set of their last match. But someone pointed out something even more interesting about Davenport's Australian Open history:
2nd Rd matches
2005: Davenport (1) def. Pastikova 2-6, 6-2, 6-2
2004: Davenport (5) def. Loit 6-3, 3-6, 6-0
2003: Davenport (9) def. Tulyaganova 6-7, 6-4, 7-5
2002: DNP
2001: Davenport (2) def. Q-Arn 6-2, 4-6, 6-2
2000: Davenport (2) def. Q-Irvin 6-4, 7-5
So except the year she won (BTW Davenport never dropped a set en route to her three grand slam titles), she's always had tough 2nd rounds at Oz.