LUD twice for 485 in last two days

LUD of my 485 was updated twice on 9/3 and 9/4 but there is no update in the contents, what does this mean?

所有跟帖： 

• 回複：LUD twice for 485 in last two days -chinan- ♂ (17 bytes) () 09/04/2008 postreply 09:40:16

• 回複：LUD twice for 485 in last two days -mountaineers- ♂ (145 bytes) () 09/04/2008 postreply 10:08:40

• 回複：5 times LUD from Augst to Sept -zaimei- ♀ (0 bytes) () 09/04/2008 postreply 15:08:34

• 回複：LUD twice for 485 in last two days -smallpeople- ♂ (67 bytes) () 09/04/2008 postreply 17:21:56