Common bugs fixed in 3.0.14 include:

o Compatibility issues between Winbind and Windows 2003 SP1
domain controllers (*2k3sp1*).
o MS-DFS errors with Windows XP SP2 clients.
o High CPU loads caused by infinite loops in the FindNext()
server code.
http://us3.samba.org/samba/history/samba-3.0.14.html