[leafnode-list] Suppressing the "Check your system clock" error?

[Adam Funk]

I keep getting the "check_date: news.virginmedia.com: clocks of
upstream and this computer are more than 10 minutes apart. Check your
system clock." e-mails, but I know it's the server's problem.  (I run
ntp and the other servers that leafnode polls don't produce this
message.)  Can I configure leafnode to suppress it?

(I'm running version 1.11.6 from the Ubuntu package.)

Thanks.