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This is happened by default from all webserver and domain rules.. you can try to another website and everything with & symbol will be replace with & on URL address.. also if you had some file with white space on the file name (like "Me and my family", when you upload (example : dropbox) and get the link will be "me%20and%20my%20family", as default URL link will change whitespace into "%20"..
We can't change this because this is default from webserver and rules from www i think :)
sorry for misunderstood, i think you want URL link appears as & instead & :D
can you provide me FTP access ? i need to added new code to create page title show into & not & or you want to added it by your self ?
go to components / com_community / helpers / head.php.. open head.php with your favourite text editor and go to very bottom on this file (Line 155 ) and you will see :