Distribution adoption is slow as always, bugfixes released take time to end up at the users...
Debian Wheezy1.8.6
Debian Wheezy Backports1.8.15
Debian Experimental1.10.1
Gentoo Stable1.8.8
Fedora 191.8.15
Fedora 201.10.2
Arch Linux1.10.3
1.8.15 is latest stable version of 1.8 line. So using Debian Backports, FreeBSD and Fedora 17-19 you are up-to-date. Only in Debian Experimental and Fedora 20 you get the most recent stable line.