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(pls see the attachment). This what I got if enter my admin link. I changed .htaccess and added php.ini in root directory to disable magic_quotes_gpc. I asked also host provider but still unsolved.
I don't know whether this issue dealing with new version of jomsocial or pure joomla/php matter.
>> Alert: This time my domain can't be accessed or resolved (efbeplus.com) DNS lookup failed.
Hope you can fix this issue (outside of resolving domain name)
Please you contact your hosting provide and disabled that library magic_quotes_gpc, this is joomla issue and server issue actually not jomsocial issue.