I've yet to upgrade to 6.7.3 yet but I'll give this a shot.

Under the primary dropdown look at the bottom, it should ask you if you'd like to display the Groupee copyright type as Text or Image; this should be what the validation routines are whining about...

I think the paramaters for the general page where updated due to the new company name in 6.7.3 so it may give people some problems for optins with no ticks.

Also, I wouild highly recommend being careful in replacing your vars files ever as they hold your forums configuration options.

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