Index: src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java
===================================================================
--- src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java	(revision 1753352)
+++ src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java	(working copy)
@@ -3036,4 +3036,11 @@
         cmo = (CommonObjectDataSubRecord)shape.getObjRecord().getSubRecords().get(0);
         assertEquals(1027, cmo.getObjectId());
     }
+    
+    @Test
+    public void test50573() throws IOException {
+        Workbook wb = HSSFTestDataSamples.openSampleWorkbook("55668.xls");
+        assertNotNull(wb);
+        wb.close();
+    }
 }
Index: test-data/spreadsheet/50573.xls
===================================================================
Cannot display: file marked as a binary type.
svn:mime-type = application/vnd.ms-excel
Index: test-data/spreadsheet/50573.xls
===================================================================
--- test-data/spreadsheet/50573.xls	(revision 0)
+++ test-data/spreadsheet/50573.xls	(working copy)

Property changes on: test-data/spreadsheet/50573.xls
___________________________________________________________________
Added: svn:mime-type
## -0,0 +1 ##
+application/vnd.ms-excel
\ No newline at end of property