Originally Posted by CLEHillbilly
I was booking a ticket to Tokyo and selected a R as the class of service. It then replied in red that it was an invalid class of service. I deleted the R and selected lowest refundable ticket from the radio buttons. It then replied Please enter a specific class of service. I had to enter a valid class, i.e K to get by the error, even with selecting the other radio button options above it. Once into the K search results I was able to reset the form to search lowest available fares.

Thanks CLEHillbilly, there are actually three bugs we found with this report. First, we're not recognizing "R" as a valid class of service in the Advanced Search. Second, the Advanced Search page still asks for a valid class of service after erroring. And third, our help page that defines valid classes of service doesn't include our new "R" and "M" classes of service. All three of these issues have been added to the master list under Booking. Thanks also to mbreuer and farenthold for your posts related to the same issue.