I've made tests on Debian 8.1 amd64
I use the installed version 5 from Your site.(on repository are 4.6)
1. With jre1.6.0_45 => GOOD
2. With jre1.7.0_79 => GOOD
3. With jre1.8.0_45 => Bad confirm bug
4. With jre1.8.0_60 => Bad confirm bug
So in java 7 it work but if You have other tests I'm available to test.