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I'm using the Bootstrap theme and it's overriding the plug-in .css which I've updated to make the Thank and Thanked By divs more visible.
Does anyone know how I can increase the priority of the Thankful People .css?
hgtonight posted a great link, recently: http://css-tricks.com/specifics-on-css-specificity/
peregrine posted a great link to a FAQ as well
it may help you as well.
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.
Thanks @R_J and @peregrine!