The workspace options dissapeared when right clicking on a window using the beryl manager.
First you need to Add Beryl Edgy Repos
sudo vi /etc/apt/sources.list
Add the following at the bottom
## Beryl Edgy Repo
deb http://ubuntu.beryl-project.org/ edgy main
Then reload your update manager.
sudo aptitude update
Now you need to downgrade the following packages
Go to the packet manager System -> Administration -> Synaptic Package Manager
Click on search and enter "libwnck", click ok, then you should see several files returned.
Select libwnck18 and go Package -> Force Version, in the drop down menu select 2.16.1 and push ok. Repeat this for the common package as well. Then push apply and you will downgrade your version of both files.
Reboot your computer and on restart you can now switch workspaces like you used to, perhaps later a patch will be made for beryl to work with 2.18.0
If you want to stop the update manager from pestering you to upgrade to 2.18.0 just search for libwnck like before and select each of the two files one at a time and then go System -> Lock Version.
The only problem with this is you will have to update these two files manually if a new version is released