This is a bug fix release which addresses issues found in 3.1.11 and earlier versions of Clover-for-Ant.
1) The main improvement implemented in this release is related with an IDEA12 "external build" feature - see Clover-for-IDEA change log.
2) The <clover-report> task supports the <columns> option for PDF report. Thanks to this you can customize list of metrics to be displayed in a PDF report.
3) We have prepared a new Clover in 10 minutes tutorial for Ant.
See also change log for Clover-for-Maven2&3, Clover-for-Eclipse, Clover-for-IDEA, Clover-for-Grails.