package pure-ftpd 1.0.36-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 255

updated from 12.04.1 to 12.10, and app crashed

ProblemType: Package
DistroRelease: Ubuntu 12.10
Package: pure-ftpd 1.0.36-1
ProcVersionSignature: Ubuntu 3.2.0-30.47-generic 3.2.27
Uname: Linux 3.2.0-30-generic x86_64
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
Date: Fri Aug 24 21:50:46 2012
DuplicateSignature:
 Setting up pure-ftpd (1.0.36-1) ...
 Starting ftp server: /usr/sbin/pure-ftpd-wrapper: Invalid configuration file /etc/pure-ftpd/conf/VerboseLog: "‘yes’" not convertible to true or false
 invoke-rc.d: initscript pure-ftpd, action "start" failed.
 dpkg: error processing pure-ftpd (--configure):
  subprocess installed post-installation script returned error exit status 255
ErrorMessage: subprocess installed post-installation script returned error exit status 255
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
SourcePackage: pure-ftpd
Title: package pure-ftpd 1.0.36-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 255
UpgradeStatus: Upgraded to quantal on 2012-08-24 (0 days ago)