What happens if you set f.color.facet.mincount=1 from the beginning ? Are you faceting on multiple fields ?
Good news we found out the first mistery though ! :) Cheers ----- --------------- Alessandro Benedetti Search Consultant, R&D Software Engineer, Director Sease Ltd. - www.sease.io -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html