gpg 1.x has been dropped; see
http://lists.opensuse.org/opensuse-factory/2007-06/msg00142.html

Index: seahorse-1.0.1/configure.in
===================================================================
--- seahorse-1.0.1.orig/configure.in
+++ seahorse-1.0.1/configure.in
@@ -83,8 +83,8 @@ AC_ARG_ENABLE(gpg-check, 
 	DO_CHECK=$enableval, DO_CHECK=yes)
 	
 if test	"$DO_CHECK" = "yes"; then
-  accepted_versions="1.2 1.4"
-  AC_PATH_PROG(GNUPG, gpg, no)
+  accepted_versions="1.2 1.4 2.0"
+  AC_PATH_PROG(GNUPG, gpg2, no)
   ok="no"
   if test "$GNUPG" != "no"; then
     AC_MSG_CHECKING(for appropriate GnuPG version)