Index: /trunk/src/VBox/HostServices/GuestControl/service.cpp
===================================================================
--- /trunk/src/VBox/HostServices/GuestControl/service.cpp	(revision 29897)
+++ /trunk/src/VBox/HostServices/GuestControl/service.cpp	(revision 29898)
@@ -436,4 +436,15 @@
     int rc = VINF_SUCCESS;
 
+    CallListIter itCall = mClientList.begin();
+    while (itCall != mClientList.end())
+    {
+        if (itCall->mClientID == u32ClientID)
+        {       
+            itCall = mClientList.erase(itCall);
+        }
+        else
+            itCall++;
+    }
+
     ClientContextsListIter it = mClientContextsList.begin();
     while (   it != mClientContextsList.end()