diff -urp icewm-1.3.7/src/wmtaskbar.cc icewm-1.3.7a/src/wmtaskbar.cc
--- icewm-1.3.7/src/wmtaskbar.cc	2010-10-31 15:09:36.000000000 +0100
+++ icewm-1.3.7a/src/wmtaskbar.cc	2011-05-31 00:05:52.000000000 +0200
@@ -902,7 +902,7 @@ void TaskBar::handleCrossing(const XCros
         if (crossing.type == EnterNotify /* && crossing.mode != NotifyNormal */) {
             fEdgeTrigger->stopHide();
         } else if (crossing.type == LeaveNotify /* && crossing.mode != NotifyNormal */) {
-            if (crossing.detail != NotifyInferior && crossing.detail != NotifyVirtual && crossing.detail != NotifyAncestor) {
+            if (crossing.detail != NotifyInferior && !(crossing.detail == NotifyVirtual && crossing.mode == NotifyGrab) && !(crossing.detail == NotifyAncestor && crossing.mode != NotifyNormal)) {
                 MSG(("taskbar hide: %d", crossing.detail));
                 fEdgeTrigger->startHide();
             } else {