Quote from: knightmb on August 15, 2010, 10:59:04 PM (https://bitcointalk.org/index.php?topic=823.msg9574#msg9574)
[edit] Just saw your post, I'll build one to less than 74,000 then, should at least save you technical people a few minutes of downloading the new chain. 
Just leave the old one alone! Older is better. What block number is it? Anywhere from 60000-74000 is good. The one that you've had available for a while has been vetted and is the best choice.