Rights:
© 2007 American Physical Society (APS). This is the accepted version of the following article: Rost, Martin & Laurson, Lasse & Dubé, Martin & Alava, Mikko J. 2007. Fluctuations in Fluid Invasion into Disordered Media. Physical Review Letters. Volume 98, Issue 5. 054502/1-4. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.98.054502, which has been published in final form at http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.98.054502.