I am having one of the well known mapper issues where it freezes up saying "Interface Descriptions". I read that the issue is solved in 9.1 Where the heck is 9.1? If I download the 9.1 release of the Engineers Toolset the version of mapper itself shows 9.05 and I still have the issue.
I have uninstalled and reinstalled multiple times with the same issue.
The workaround with @vlan# does not work for me since I have @';s in my strings.
Also I have installed 9.1 hotfix 2.