Thank you for your response. I am changing the labels in the resource files.
Upon further investigation i see the label works in expanded/full screen view. If i shrink the desktop web browser OR view on my phone, the label reverts back to Buying Guide when the view switches to the small/collapsed view.
i'm using an unmodified Product Detail template to rule out any changes i may have made. Can you suggest where i should be looking to correct this?
thanks
fred