Hey, big fan of the site. Recently I've been doing the interactive website course, and it seems that consistently code will be marked as incorrect despite it working as intended. This seems to occur when using double quotation marks ( " ) rather than single ( ' ). This is mildly frustrating for those who prefer to use double quotation marks over single. This issue seems to be localised to the interactive website course.
Thanks for letting us know. We're aware of this issue, but it's not a high-enough priority bug to warrant being fixed at this time.