I'm having an issue with a Joomla site, It was recently upgraded to Joomla 3.0 but now the home page hows the error "undefined method Joomla\Registry\Registry::getValue()", the only issue is it does not tell me which files are throwing this error.
I have run a file search in cPanel and a grep at command line to find any files with "getValue" in them but all responses are 0. I've even checked the database, just in case a previous developer put it in there but I have nothing.
I've searched the web, checked error logs, disabled plugins and pretty much bashed my skull against the wall for the last week to no avail.
Can anyone help? I working on the updated site here: http://dev.hershmanlegal.com/
In the backend of your Joomla site, try going to System > Global Configuration > Server, change the error reporting to Maximum and see if you get more details about the source of the problem.
If still no joy, check your server error logs.
Good luck!