Index: src/ch/MainWnd.cpp
===================================================================
diff -u -N -r8b7479db2ee71a3d00779c67fe6a1b1d9ec414b8 -ra44714d5c7ec0f50a376f4d0ea919ee5a224f834
--- src/ch/MainWnd.cpp	(.../MainWnd.cpp)	(revision 8b7479db2ee71a3d00779c67fe6a1b1d9ec414b8)
+++ src/ch/MainWnd.cpp	(.../MainWnd.cpp)	(revision a44714d5c7ec0f50a376f4d0ea919ee5a224f834)
@@ -613,7 +613,7 @@
 	{
 	case WM_MINIVIEWDBLCLK:
 		{
-			chcore::TTaskPtr spTask = m_spTasks->GetTaskByTaskID(lParam);
+			chcore::TTaskPtr spTask = m_spTasks->GetTaskByTaskID(boost::numeric_cast<chcore::taskid_t>(lParam));
 			ShowStatusWindow(spTask);
 			break;
 		}