In "Relaxed Online SVMs for Spam Filtering" the function f(x) was incorrectly defined as: f(x)=sign(< w , x > + b). The correct forumlation is: f(x)=< w , x > + b. Classifciation is performed by using sign(f(x)). This mistake appeared in Figures 1 and 4, and in the text of section 2.1. Many thanks to Mona Mojdeh of the University of Waterloo for spotting this error.