Watermarked messages still checked for spam in 4.62.3

[Chris Yuzik]

Julian,

I have installed the latest beta and have been testing the watermarking 
feature. Something isn't working right.

I have "Skip Spam Checks If Watermark Valid = yes" in the 
MailScanner.conf file, have defined a secret, and of course restarted 
MailScanner.

User "a" sends to user "b". "B" receives message and watermark header is 
indeed added (so far so good).

User "B" replies to message with gtube text, and spamassassin gives 
message a score of 997.40 and quarantines the message.

Did I misconfigure something?

Thanks,
Chris