diff --git a/.hgignore b/.hgignore
index b0d92c60..53e2d2a8 100644
--- a/.hgignore
+++ b/.hgignore
@@ -32,5 +32,8 @@ missing
 # Ignoring executables
 *_test
 examples/scaneclipsedeck
+examples/spu_2p
+tests/test_cfs_tpfa
+tests/test_jacsys
 tests/test_readvector
 tests/test_sf2p
diff --git a/configure.ac b/configure.ac
index 4d0b2126..b67a70b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,10 +33,6 @@ AX_LAPACK
 # Checks for header files.
 AC_CHECK_HEADERS([float.h limits.h stddef.h stdlib.h string.h])
 
-AC_CHECK_HEADERS([suitesparse/umfpack.h],
-                 [umfpack_header=yes],
-                 [umfpack_header=no])
-
 # Checks for typedefs, structures, and compiler characteristics.
 AC_HEADER_STDBOOL
 AC_TYPE_SIZE_T
@@ -45,8 +41,17 @@ AC_CHECK_TYPES([ptrdiff_t])
 # Checks for library functions.
 AC_CHECK_FUNCS([floor memmove pow sqrt strchr strtol])
 
+
+# To use UMFPACK, we need the header, and both the AMD and UMFPACK libs.
+AC_CHECK_HEADERS([suitesparse/umfpack.h],
+                 [umfpack_header=yes],
+                 [umfpack_header=no])
+
+AC_SEARCH_LIBS([amd_free], [amd],
+               [amd_lib=yes], [amd_lib=no], [-lm])
+
 AC_SEARCH_LIBS([umfpack_dl_solve], [umfpack],
-               [umfpack_lib=yes], [umfpack_lib=no])
+               [umfpack_lib=yes], [umfpack_lib=no], [-lamd -lm])
 
 AM_CONDITIONAL([UMFPACK],
   [test "x$umfpack_header" != "xno" -a "x$umfpack_lib" != "xno"])
diff --git a/opm/core/transport/CSRMatrixBlockAssembler.hpp b/opm/core/transport/CSRMatrixBlockAssembler.hpp
index b55236a3..342ce455 100644
--- a/opm/core/transport/CSRMatrixBlockAssembler.hpp
+++ b/opm/core/transport/CSRMatrixBlockAssembler.hpp
@@ -102,12 +102,12 @@ namespace Opm {
 
                 sa_.insert(sa_.end(), nconn * ndof, double(0.0));
 
-                construct();
-                setCSRSize();
+                finalizeStructure();
             }
 
             void
             finalizeStructure() {
+                construct();
                 setCSRSize();
             }
 
@@ -121,8 +121,6 @@ namespace Opm {
 
                 ia_.push_back(0);
                 ndof_ = ndof;
-
-                construct();
             }
 
             struct CSRMatrix&       matrix()       { return mat_; }
diff --git a/tests/test_readvector.cpp b/tests/test_readvector.cpp
index 9fe07d8e..d82c898c 100644
--- a/tests/test_readvector.cpp
+++ b/tests/test_readvector.cpp
@@ -26,7 +26,7 @@ read_grid(const std::string& dir)
     read_vector_from_file(fn, actnum);
 
     fn = dir + '/' + "dimens.txt";
-    ::std::vector<double> dimens;
+    ::std::vector<int> dimens;
     read_vector_from_file(fn, dimens);
 
     struct grdecl grdecl;