Hotfix 83165

CME is not working properly with FireFox version 17.

Version
This hotfix concerns SDL Tridion 2011 SP1HR1.
Problem description
CME is not working properly with FireFox version 17.
Hotfix description
The way Tridion.Type.isString(obj) was implemented can generate infinite recursion in FireFox v17. We've changed its implementation.
Distributed files
Types.js
Fixes included
None
Dependencies
None