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modules/system/js/module.js is trowing a 508 error (not used)
modules/system/js/admin.js loads ok.
I don't know what is wrong with module.js in particular, the code is similar to other js files loaded. If I access module.js link(in source code) the javascript text is outputed correctly.
508 is very rare error, I got little information from googling it.
I can't reproduce this bug in my server/localhost either, which leads me thinking it is also related with your server.
Can you give me ftp access to the site?