Here is something that I did find from user 'atran' on page 3 of this post
I noticed that my /usr/sbin/fuzzy-cleanmysql would hang and my CPU would jump WAY
up when trying to run. I added the <CONFIG> to the while
loop and it runs without a hitch. I also check the Hash and Safe tables after the script running and I noticed that the tables were smaller.
This may have been the issue but I would still like an explanation on the Greyfix error above. Although, it may be related to the while loop in /usr/sbin/fuzzy-cleanmysql.