Rights:
© 2004 American Physical Society (APS). This is the accepted version of the following article: Alava, Mikko J. & Zapperi, S. 2004. Comment on “Roughness of Interfacial Crack Fronts: Stress-Weighted Percolation in the Damage Zone”. Physical Review Letters. Volume 92, Issue 4. 049601/1. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.92.049601, which has been published in final form at http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.92.049601.