I did read your post. My reply was based on it. To anyone reading it, the wording seems to imply that you were having the problems with 4 sticks of 2GB each, then you replaced them with only 2, totaling the same amount of memory. Nothing was mentioned about whether the problems persisted after that.
As it stands, the board does have problems with 4 memory modules, as is evident from your case and widely reported by many others.