Tynt function do not work in JobRoller 1.7. Everything else works so if you do not use this function anyway you can update to 1.7. We are counting on a week to create a fix to this problem.
I love to help out you out but please read this first Have you tried to install in a root domain? Have you tried to Resave permalinks? Have you tried to disable all plug in? Have you tried the default theme of Wordpress?
++ If the issue is fixed consider closing the thread and change to solved, thank you for helping us helping you. ++
