You can still get the 12 month display. You just have to know how.
They have obviously made a change in how the Calendar is calling up the reports.
Here's how to show the one year data (and the trick is highlighted in red):
Calendar>>Choose the last date from last month
(so Jan 31 for this example)>>Weight tab>>My Weight Reports>>Click 12 month
The 12 month data will NOT be displayed for ANY DAY IN THE CURRENT MONTH. This is new, they have obviously made a change to the program recently.
Notice where February 1, 2012 is the selected date? No year graph for the current month is displayed.