SURBL has reorganized its lists and provided a new spamassassin configuration to support those changes: http://lists.surbl.org/pipermail/announce/2013-May/000209.html
I'm using sa-update (version 3.003001) and noticed that 25_uribl.cf already contains the new configuration, but with all lines commented out. I've added the new URIBL_MW_SURBL lines to my local.cf as a workaround, but the sa-update maintainers might want to take a look.
