samba - Dec 2002 - strange smbstatus locked files

Hello all,

i suddenly have entrys like

21818 DENY_WRITE 0x20089   RDONLY  NONE   :U   Mon Dec  2 07:02:42 2002
21818 DENY_WRITE 0x100020  RDONLY  NONE   :U   Mon Dec  2 07:02:39 2002
21818 DENY_WRITE 0x100020  RDONLY  NONE   UT   Mon Dec  2 07:02:49 2002
16132 DENY_WRITE 0x20      RDONLY  NONE   UT   Mon Dec  2 11:21:36 2002
21818 DENY_WRITE 0x100020  RDONLY  NONE   UT   Mon Dec  2 07:02:48 2002
16132 DENY_WRITE 0x20089   RDONLY  NONE   UT   Mon Dec  2 11:21:34 2002
16132 DENY_WRITE 0x20      RDONLY  NONE   UT   Mon Dec  2 11:21:11 2002
21818 DENY_WRITE 0x20089   RDONLY  NONE   UT   Mon Dec  2 07:02:46 2002
21818 DENY_WRITE 0x100020  RDONLY  NONE   UT   Mon Dec  2 07:02:45 2002
16132 DENY_WRITE 0x20      RDONLY  NONE   UT   Mon Dec  2 11:21:13 2002

in smbstatus in the locked files list. What could UT and :U mean as file 
path? There is no such file?
And these locks dont't disapear.

And hint appreciated.

Holger