Win 7 displays incorrect "date modified" on network folders

Hi,

OES2 - SP3
Windows 7 and Windows XP workstations running latest Novell clients.

When browsing network drives, Windows 7 shows folders with Date Modified ranging from 1980 to 2074.
Only affecting folders not files.
Happening on all Windows 7 Machines.
From Windows XP every folder date is correct.

Any ideas?