Index: src/resources/scratchpad/org/apache/poi/hdgf/chunks_parse_cmds.tbl
===================================================================
--- src/resources/scratchpad/org/apache/poi/hdgf/chunks_parse_cmds.tbl	(revision 903621)
+++ src/resources/scratchpad/org/apache/poi/hdgf/chunks_parse_cmds.tbl	(working copy)
@@ -142,11 +142,14 @@
 18 0 0
 end
 
-#seems to be text string
-start 45
-10 0 Unknown 0x2d
-12 0 0
-end
+# According to information from vsdump, the following would seem to be
+# a text string, but the Visio diagrams attached to
+# https://issues.apache.org/bugzilla/show_bug.cgi?id=43670 contain
+# type 0x2d chunks that can't be text. Thus this entry is commented out.
+#start 45
+#10 0 Unknown 0x2d
+#12 0 0
+#end
 
 start 49
 10 0 Stream31
Index: src/scratchpad/src/org/apache/poi/hdgf/chunks/ChunkHeaderV11.java
===================================================================
--- src/scratchpad/src/org/apache/poi/hdgf/chunks/ChunkHeaderV11.java	(revision 903621)
+++ src/scratchpad/src/org/apache/poi/hdgf/chunks/ChunkHeaderV11.java	(working copy)
@@ -33,7 +33,10 @@
 		if(hasTrailer()) { return true; }
 
 		if(unknown2 == 2 && unknown3 == 0x55) { return true; }
+		if(unknown2 == 2 && unknown3 == 0x54 && type == 0xa9) { return true; }
 		if(unknown2 == 2 && unknown3 == 0x54 && type == 0xaa) { return true; }
+		if(unknown2 == 2 && unknown3 == 0x54 && type == 0xb4) { return true; }
+		if(unknown2 == 2 && unknown3 == 0x54 && type == 0xb6) { return true; }
 		if(unknown2 == 3 && unknown3 != 0x50) { return true; }
 		if(type == 0x69) { return true; }