diff --git a/git-svn.perl b/git-svn.perl
index c015ea8580..ec25ea4231 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -390,7 +390,8 @@ sub cmd_dcommit {
 		     "If these changes depend on each other, re-running ",
 		     "without --no-rebase will be required."
 	}
-	foreach my $d (@$linear_refs) {
+	while (1) {
+		my $d = shift @$linear_refs or last;
 		unless (defined $last_rev) {
 			(undef, $last_rev, undef) = cmt_metadata("$d~1");
 			unless (defined $last_rev) {
@@ -423,14 +424,14 @@ sub cmd_dcommit {
 
 			# we always want to rebase against the current HEAD,
 			# not any head that was passed to us
-			my @diff = command('diff-tree', 'HEAD',
+			my @diff = command('diff-tree', $d,
 			                   $gs->refname, '--');
 			my @finish;
 			if (@diff) {
 				@finish = rebase_cmd();
-				print STDERR "W: HEAD and ", $gs->refname,
+				print STDERR "W: $d and ", $gs->refname,
 				             " differ, using @finish:\n",
-				             "@diff";
+				             join("\n", @diff), "\n";
 			} else {
 				print "No changes between current HEAD and ",
 				      $gs->refname,
@@ -439,6 +440,45 @@ sub cmd_dcommit {
 				@finish = qw/reset --mixed/;
 			}
 			command_noisy(@finish, $gs->refname);
+			if (@diff) {
+				@refs = ();
+				my ($url_, $rev_, $uuid_, $gs_) =
+				              working_head_info($head, \@refs);
+				my ($linear_refs_, $parents_) =
+				              linearize_history($gs_, \@refs);
+				if (scalar(@$linear_refs) !=
+				    scalar(@$linear_refs_)) {
+					fatal "# of revisions changed ",
+					  "\nbefore:\n",
+					  join("\n", @$linear_refs),
+					  "\n\nafter:\n",
+					  join("\n", @$linear_refs_), "\n",
+					  'If you are attempting to commit ',
+					  "merges, try running:\n\t",
+					  'git rebase --interactive',
+					  '--preserve-merges ',
+					  $gs->refname,
+					  "\nBefore dcommitting";
+				}
+				if ($url_ ne $url) {
+					fatal "URL mismatch after rebase: ",
+					      "$url_ != $url";
+				}
+				if ($uuid_ ne $uuid) {
+					fatal "uuid mismatch after rebase: ",
+					      "$uuid_ != $uuid";
+				}
+				# remap parents
+				my (%p, @l, $i);
+				for ($i = 0; $i < scalar @$linear_refs; $i++) {
+					my $new = $linear_refs_->[$i] or next;
+					$p{$new} =
+						$parents->{$linear_refs->[$i]};
+					push @l, $new;
+				}
+				$parents = \%p;
+				$linear_refs = \@l;
+			}
 			$last_rev = $cmt_rev;
 		}
 	}
diff --git a/t/t9106-git-svn-dcommit-clobber-series.sh b/t/t9106-git-svn-dcommit-clobber-series.sh
new file mode 100755
index 0000000000..7eff4cdc05
--- /dev/null
+++ b/t/t9106-git-svn-dcommit-clobber-series.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Eric Wong
+test_description='git-svn dcommit clobber series'
+. ./lib-git-svn.sh
+
+test_expect_success 'initialize repo' "
+	mkdir import &&
+	cd import &&
+	awk 'BEGIN { for (i = 1; i < 64; i++) { print i } }' > file
+	svn import -m 'initial' . $svnrepo &&
+	cd .. &&
+	git svn init $svnrepo &&
+	git svn fetch &&
+	test -e file
+	"
+
+test_expect_success '(supposedly) non-conflicting change from SVN' "
+	test x\"\`sed -n -e 58p < file\`\" = x58 &&
+	test x\"\`sed -n -e 61p < file\`\" = x61 &&
+	svn co $svnrepo tmp &&
+	cd tmp &&
+		perl -i -p -e 's/^58\$/5588/' file &&
+		perl -i -p -e 's/^61\$/6611/' file &&
+		test x\"\`sed -n -e 58p < file\`\" = x5588 &&
+		test x\"\`sed -n -e 61p < file\`\" = x6611 &&
+		svn commit -m '58 => 5588, 61 => 6611' &&
+		cd ..
+	"
+
+test_expect_success 'some unrelated changes to git' "
+	echo hi > life &&
+	git update-index --add life &&
+	git commit -m hi-life &&
+	echo bye >> life &&
+	git commit -m bye-life life
+	"
+
+test_expect_success 'change file but in unrelated area' "
+	test x\"\`sed -n -e 4p < file\`\" = x4 &&
+	test x\"\`sed -n -e 7p < file\`\" = x7 &&
+	perl -i -p -e 's/^4\$/4444/' file &&
+	perl -i -p -e 's/^7\$/7777/' file &&
+	test x\"\`sed -n -e 4p < file\`\" = x4444 &&
+	test x\"\`sed -n -e 7p < file\`\" = x7777 &&
+	git commit -m '4 => 4444, 7 => 7777' file &&
+	git svn dcommit &&
+	svn up tmp &&
+	cd tmp &&
+		test x\"\`sed -n -e 4p < file\`\" = x4444 &&
+		test x\"\`sed -n -e 7p < file\`\" = x7777 &&
+		test x\"\`sed -n -e 58p < file\`\" = x5588 &&
+		test x\"\`sed -n -e 61p < file\`\" = x6611
+	"
+
+test_done