Has anyone SOLVED this? I am having the same issue --- in the 8 years I have been using JOOMLA and ROCKET THEME , I never had this issue... I cannot LOG OUT!
That's exactly what is happening although prior to the last Gantry & Joomla update all was fine. What is the issue? I have not changed any settings on the server.
It is clearly not related to RocketTheme - same issue with Beez3 standard template. I have applied the latest patch from today but it did not resolve the issue.
Anyway - thanks for your help!