Black that it is revealed as soon as your units move or black forever? You need to make a custom icon if you want the forever black. You will get a black pic, set its size to a minimap size icon and convert it to *.tga. Then, get the path that refers to the minimap. Actually get a tutorial for custom minimap pics, you will get everything. Search here or google it.
Finally finding about some of the bots that are flooding the users online - bytespider apparently is a huge offender here - ignores robots.txt and comes in from a ton of different IPs
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.