It happened last night. after Ehuven killed me the first time i could'nt see any one on the radar, though i could target them!

i tried to change chars but it did'nt help...

was it the radar toggle? some ppl told me to use "H" but it was no good.

press R for RadarAll

Evhun. It's Evhun. Hrr harr.

You may have accidentally toggled some radar bliptypes off.
shift-r should bring them all back like sputnick said.
or type /showall in the console.