I have this plugin installed and its working great at http://wyomingbackpacks.org/ but as Im building the site, everytime I install and activate a plugin, I get messages about ‘cannot modify header information’ . See this screenshot when I activated ‘all in one seo’ http://take.ms/uz4Ma. I get this for any plugin. I can hit the back button and see that the plugin DID activate and it works fine.
can you please help?
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