Index: tests/formatting/Slashit.php
===================================================================
--- tests/formatting/Slashit.php	(revision 1095)
+++ tests/formatting/Slashit.php	(working copy)
@@ -4,6 +4,10 @@
  * @group formatting
  */
 class Tests_Formatting_Slashit extends WP_UnitTestCase {
+	function test_backslashes_middle_numbers() {
+		$this->assertEquals("\\a-!9\\a943\\b\\c", backslashit("a-!9a943bc"));
+	}
+
 	function test_backslashes_alphas() {
 		$this->assertEquals("\\a943\\b\\c", backslashit("a943bc"));
 	}