iput messages

Hi All, Sorry for the english... I have a server that keeps filling /var/log/warn with messages like the following: Mar 20 10:46:14 rmdserve kernel: iput: inode 00:00/5333965 still has locks! Mar 20 10:46:14 rmdserve kernel: iput: inode 00:00/5333969 still has locks! Mar 20 10:46:14 rmdserve kernel: iput: inode 00:00/5333971 still has locks! Mar 20 10:46:14 rmdserve kernel: iput: inode 00:00/5333973 still has locks! Mar 20 10:46:14 rmdserve kernel: iput: inode 00:00/5333975 still has locks! Everything works fine, but the warn file is filling up every 2 weeks. Is there anything I can do? What does the message mean? TIA, Mark