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You should change the module position for all jomsocial modules to js_side_frontpage_top, js_side_frontpage_bottom or js_side_frontpage, in version 4.0.x we added some new positions, please read here for more information
documentation.jomsocial.com/wiki/Built-in_Module_Positions
I have now fixed this by removing some modules and renaming them to shorter names - that was the issue really one of spacing but thanks for the initial pointer.