System Information
Windows
Blender Version
Broken: (example: 2.69 release)
Short description of error
Users with usernames containing non us characters can not install addons in their application data folder
Exact steps for others to reproduce the error
Create a user with one or more special characters (utf16 or possibly windows CP-1252 character set)
Install Blender for this user
Try to install an Addon
typically it breaks with following message in the console: