There is an error when changing reverb parameters.
and then the error:
"Freeverb offsetroom must be between 0 and 0"
This is the error of the message which supposed to be "Freeverb offsetroom must be between 0 and 10."
-reverb=f,1,0,1,1 should be accepted on the current build anyway.
Thank you for the report.
I'll fix the message.