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Chris Thilgen 6
Error in Trailhead Example
https://developer.salesforce.com/trailhead/force_com_introduction/point_click_business_logic/validation_rules
Website Extension Example includes ".co.uk" in the Error Message section (which the code does not actually check)
Website Extension Example includes ".co.uk" in the Error Message section (which the code does not actually check)
As for the formula, I believe adding the line below should help validate this website as well:
RIGHT( Web_Site__c, 6) <> ".CO.UK",
Sandeep Bhanot
Salesforce.com