"Aspartame and brain cancer" by Roberts, H.J. in LANCET 349 (9048): 362-362 FEB 1 1997 discusses it all pretty thoroughly.
Nasor, could you provide me with a link that shows that backs up the claims you made. I tried to find the text of the H.J. Roberts article but couldn't. I did however find out a little something about the author - apparently Dr. H.J. Roberts is convinced that aspartame is extremely dangerous to the extent that he coined the phrase "aspartame disease" and wrote a 1038 page book titled "Apartame Disease: An Ignored Epidemic." (http://www.sunsentpress.com/aspartameDisease.html) So I seriously doubt that the paper you have provided, "Aspartame and Brain Cancer" is the refutation you believe it is and are leading others to believe it is. You seem to be blinded devoted to this synthetic chemical. I suggest you educate yourself. You can begin by reading this page by Dr. H.J. Roberts:
http://www.wnho.net/fdaapprovedepidemic.htm