Quite soon after release 2.11.8 a bugfix and security update of the development versions.
This version fixes two issues that were found in the previous development release.
1. click tracking did not work
2. the graphical editor did not load, if you had a different path than the default "lists" for phpList.
It also fixes several security issues in 2.11.8 found by HTTPCS.
If you run a 2.11 version of phpList it is recommended to upgrade to this version.