When redirecting a user profile folder or folders using Group Policy, if the option "Move the contents of <folder> to the new location" is not selected there will be duplicate folders created in a user profile: one pointing to the redirected location and one on the local hard drive. Unless this option is selected, a duplicate link will be left behind, even when that folder is completely empty.
This behavior is by design.
Local copies of the user profile folder(s) may be safely deleted if they are empty.
Windows Vista Business, Windows Vista Business 64-bit Edition, Windows Vista Enterprise, Windows Vista Enterprise 64-bit Edition, Windows Vista Home Basic, Windows Vista Home Basic 64-bit Edition, Windows Vista Home Premium, Windows Vista Home Premium 64-bit Edition, Windows Vista Ultimate, Windows Vista Ultimate 64-bit Edition