  We perform a systematic search of cold fronts in a sample of 62 clusters
observed with XMM-Newton with redshift ranging from 0.01 to 0.3. We detect one
or more cold fronts in 21 (34%) of our objects. A large fraction (87.5%) of
nearby clusters 0.01 < z < 0.04 host a cold front while only 20% of the distant
clusters, mostly merging clusters, do so. The absence of sharp surface
brightness discontinuites in distant cool cores is most likely a consequence of
the insufficent spatial resolution of our images. Some nearby cool core
clusters show a dislocation between the surface brightness and the pressure
peak. This implies that the cool central gas is displaced from the bottom of
the gravitational potential well and likely sloshing.
