After upgrading from SoSSE 11 to 12.0.1,on the SQL Server Overview page that the graphical image for Median Fragmentation and Maximum Fragmentation is no longer present.
We have removed the defragmented indexes metric from the homepage because it did not work property for many customers and the values shown in the metric did not reflect the reality of the defragmented indexes after you defragmented the indexes.
Additionally information on the home page was derived form different collection than the one in drilldown and collected in different frequency.
We will have this re-enabled again in a future release once this issue is fixed (reference for the enhancement request :#SES-51) .
Currently the Database metric on homepage will allow Fragmented Indexes alarms to be viewed from the drilldown details and clicking on second tab once there.