diff --git a/doc/Changelog.html b/doc/Changelog.html
index ff490b53..4ec14537 100644
--- a/doc/Changelog.html
+++ b/doc/Changelog.html
@@ -24,7 +24,7 @@ a:visited { color: #0000EE; }
 <li>Updated Qt runtime libraries to v4.8.0 (2011-12-15), compiled with MSVC 10.0
 <li>Updated LAME encoder to v3.99.2 Final (2011-11-18), compiled with ICL 12.1.7 and MSVC 10.0 (<a href="http://lame.cvs.sourceforge.net/viewvc/lame/lame/doc/html/history.html?revision=1.134" target="_blank">details</a>)
 <li>Updated MediaInfo to v0.7.53 (2012-01-24), compiled with ICL 12.1.6 and MSVC 10.0
-<li>Updated Monkey's Audio binary to v4.10 (2011-04-16)
+<li>Updated Monkey's Audio binary to v4.11 (2011-04-20)
 <li>Updated Musepack decoder to revision 475 (2011-08-10), compiled with ICL 12.1.6 and MSVC 10.0
 <li>Implemented coalescing of update signals to reduce the CPU usage of the LameXP process (<a href="http://forum.doom9.org/showpost.php?p=1539631&postcount=507" target="_blank">details</a>)
 <li>Run more than four instances in parallel on systems with more than four CPU cores (<a href="FAQ.html#89cbd3d0" target="_blank">details</a>)
diff --git a/res/tools/mac.exe b/res/tools/mac.exe
index f7e0e82a..2fc932b0 100644
Binary files a/res/tools/mac.exe and b/res/tools/mac.exe differ
diff --git a/src/Config.h b/src/Config.h
index addaebe7..22902481 100644
--- a/src/Config.h
+++ b/src/Config.h
@@ -28,9 +28,9 @@
 #define VER_LAMEXP_MAJOR					4
 #define VER_LAMEXP_MINOR_HI					0
 #define VER_LAMEXP_MINOR_LO					4
-#define VER_LAMEXP_TYPE						Alpha
-#define VER_LAMEXP_PATCH					17
-#define VER_LAMEXP_BUILD					888
+#define VER_LAMEXP_TYPE						Beta
+#define VER_LAMEXP_PATCH					1
+#define VER_LAMEXP_BUILD					890
 
 ///////////////////////////////////////////////////////////////////////////////
 // Tool versions (minimum expected versions!)
diff --git a/src/Tool_Abstract.cpp b/src/Tool_Abstract.cpp
index a8da06c0..55e21944 100644
--- a/src/Tool_Abstract.cpp
+++ b/src/Tool_Abstract.cpp
@@ -89,6 +89,11 @@ AbstractTool::AbstractTool(void)
  */
 AbstractTool::~AbstractTool(void)
 {
+	if(m_handle_jobObject)
+	{
+		CloseHandle(m_handle_jobObject);
+		m_handle_jobObject = NULL;
+	}
 }
 
 /*
diff --git a/src/Tools.h b/src/Tools.h
index 7e1ed0ed..ff1df924 100644
--- a/src/Tools.h
+++ b/src/Tools.h
@@ -64,7 +64,7 @@ g_lamexp_tools[] =
 	{"b3fca757b3567dab75c042e62213c231de378ea0fdd7fe29b733417cd5d3d33558452f94", CPU_TYPE_ALL_ALL, "gpgv.gpg", UINT_MAX},
 	{"d5b35689208aaaf2809c3fb501e8e74af410378dc5f1921df30f2525e2ee084e5a9f9595", CPU_TYPE_ALL_GEN, "lame.i386.exe", 3992},
 	{"cfc59f7c299569355d8b4143a4f0524edf5b78dc61402c03be938dbabb5c2db5695feedd", CPU_TYPE_ALL_SSE, "lame.sse2.exe", 3992},
-	{"b7c4a839282db1b22a4c12737191a15a028001801d5835df34010663430f9a33fdd5a83e", CPU_TYPE_ALL_ALL, "mac.exe", 410},
+	{"d4d806fc3d0a36ef357ea43b870c7e46de9c18be9920f451314d72d02ba0fe4f7c867d9c", CPU_TYPE_ALL_ALL, "mac.exe", 411},
 	{"ab3f6a8f2bc08011fdcea2e54a9b234ba67d304b5eea3fc0db653e603f938d0280fba0f0", CPU_TYPE_X86_ALL, "mediainfo.i386.exe", 753},
 	{"c1d88d1b04f72118f21b5f574c4008fd0c99f3d6ed11cc9c8644b831971d1e1153cd63ea", CPU_TYPE_X64_ALL, "mediainfo.x64.exe",  753},
 	{"ed49bfeb5113e8eca4f2f5c5c9359f6edeecf457cff8511178902c7d792380eaa578d9bc", CPU_TYPE_ALL_ALL, "mpcdec.exe", 475},