do-release-update for kubuntu 13.10 crashes

[kgnter]

do-release-update for 13.10 crashes

console output attached

Main error msg.: "An unresolvable problem occurred while calculating the upgrade." But i don't know what the problem is. I already deleted all unofficial sources & packages without any success.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubuntu-release-upgrader-core 1:0.192.13
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
CrashDB: ubuntu
Date: Fri Oct 18 22:24:47 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-07-05 (104 days ago)
InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to raring on 2013-10-18 (0 days ago)