revert to common_user_error, which is what is used everywhere
revert to common_user_error, which is what is used everywhere

darcs-hash:20080626225002-84dde-898a118457577e321f426270f8c98072962341ab.gz

brion/StatusNet,Piratas/tortuga,bankonme/gnu-social,eXcomm/gnu-social,minmb/statusnet,gnusocial/mainline,UngPirat/freesocial,faulteh/gnu-social,eXcomm/gnu-social,csarven/statusnet,foocorp/gnu-social,csarven/statusnet,charlycoste/StatusNet,sikevux/bsk-social,chimo/social,bankonme/gnu-social,zcopley/StatusNet,chimo/social,eXcomm/gnu-social,sikevux/bsk-social,xebia/statusnet-oauth2,studio666/gnu-social,znarf/statusnet-ladistribution,gnusocial/mainline,zcopley/zcopleys-statusnet-clone,zh/statusnet,shashi/StatusNet,csarven/statusnet,d3vgru/StatusNet,Br3nda/laconica,studio666/gnu-social,studio666/gnu-social,foocorp/gnu-social,zh/statusnet,d3vgru/StatusNet,studio666/gnu-social,Br3nda/laconica,xebia/statusnet-oauth2,zcopley/StatusNet,Piratas/tortuga,faulteh/gnu-social,gnusocial/mainline,zcopley/zcopleys-statusnet-clone,Piratas/tortuga,sikevux/bsk-social,minmb/statusnet,csarven/statusnet,znarf/statusnet-ladistribution,xebia/statusnet-oauth2,bankonme/gnu-social,UngPirat/freesocial,Br3nda/laconica,UngPirat/freesocial,shashi/StatusNet,eXcomm/gnu-social,chimo/social,sikevux/bsk-social,meitar/laconica,Piratas/tortuga,bankonme/gnu-social,furtherfield/gnu-social,zcopley/zcopleys-statusnet-clone,brion/StatusNet,znarf/statusnet-ladistribution,zh/statusnet,charnimda/lgbtpzn-social,shashi/StatusNet,brion/StatusNet,faulteh/gnu-social,minmb/statusnet,d3vgru/StatusNet,zcopley/StatusNet,gnusocial/mainline,furtherfield/gnu-social,meitar/laconica,charnimda/lgbtpzn-social,faulteh/gnu-social,charlycoste/StatusNet,furtherfield/gnu-social,meitar/laconica,charnimda/lgbtpzn-social,charlycoste/StatusNet,furtherfield/gnu-social,foocorp/gnu-social