mysqlfailover log error filter check failed

I've noticed in my mysqlfailover log that I was seeing 'filter check failed'. I've proven that this error is related to a setting I made in the mysql config file.

replicate-ignore-db = databasename

if I remove this setting the 'filter check failed' message disappears from the mysqlfailover log. Does anyone have any experience of this? I do need to have the replicate-ignore-db parameter set but I'd rather not see the error in the mysqlfailover log file.

Thanks in advance.