Unable to upgrade from 13.10 (official, stable release) to 14.04.

[Josiah Stevenson]

Output from last part of upgrade from terminal:

Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Building data structures... Done

Calculating the changes

Calculating the changes

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade.

This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu

If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.

Restoring original system state

Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done
Building data structures... Done

Installed the standard release of 13.10 (dual-booting) with no problems. Running Cinnamon desktop.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubuntu-release-upgrader-core 1:0.205.6
ProcVersionSignature: Ubuntu 3.11.0-22.38-generic 3.11.10.8
Uname: Linux 3.11.0-22-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CrashDB: ubuntu
Date: Tue Jun 10 13:30:05 2014
InstallationDate: Installed on 2014-01-03 (158 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2014-06-10 (0 days ago)

[Josiah Stevenson (josiahstevenson)]

...apparently Cinnamon was the problem; removing it made the upgrade proceed.

Is that supposed to happen? Is there a way to install Cinnamon such that it doesn't stall the upgrade in the future?