diff --git a/TODO b/TODO
index 84c1919..36c9f6f 100644
--- a/TODO
+++ b/TODO
@@ -9,9 +9,6 @@ Bugs to fix for 1.1:
   if the new one is not legal. i.e., we must constantly update the valid ranges
   of the spin boxes if any value changes.
 
-* sector alignment in extended partitions seems to be broken or at least uses
-  some cylinder alignment logic (offset of 63)
-
 ===============================================================================
 
 For releases after 1.1:
diff --git a/src/core/partitiontable.cpp b/src/core/partitiontable.cpp
index c0f52bf..c280572 100644
--- a/src/core/partitiontable.cpp
+++ b/src/core/partitiontable.cpp
@@ -462,6 +462,8 @@ void PartitionTable::setType(const Device& d, TableType t)
 	setLastUsableSector(defaultLastUsable(d, t));
 
 	m_Type = t;
+
+	updateUnallocated(d);
 }
 
 static bool isPartitionLessThan(const Partition* p1, const Partition* p2)
diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index 0f2e85f..52c4f48 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -992,6 +992,7 @@ void MainWindow::onPropertiesDevice(const QString&)
 				d.partitionTable()->setType(d, PartitionTable::msdos);
 
 			on_m_OperationStack_devicesChanged();
+			pmWidget().updatePartitions();
 		}
 
 		delete dlg;