Index: x11/xfce4-taskmanager/files/patch-src_app-manager.c
===================================================================
--- x11/xfce4-taskmanager/files/patch-src_app-manager.c	(nonexistent)
+++ x11/xfce4-taskmanager/files/patch-src_app-manager.c	(working copy)
@@ -0,0 +1,60 @@
+--- src/app-manager.c	2018-05-30 22:29:22.000000000 +0300
++++ src/app-manager.c	2018-06-21 12:08:04.839503000 +0300
+@@ -44,6 +44,7 @@
+ static void	apps_add_application				(GArray *apps, WnckApplication *application, GPid pid);
+ static void	apps_remove_application				(GArray *apps, WnckApplication *application);
+ static App *	apps_lookup_pid					(GArray *apps, GPid pid);
++static App *	apps_lookup_app					(GArray *apps, WnckApplication *application);
+ static void	application_opened				(WnckScreen *screen, WnckApplication *application, XtmAppManager *manager);
+ static void	application_closed				(WnckScreen *screen, WnckApplication *application, XtmAppManager *manager);
+ 
+@@ -97,12 +98,17 @@
+ app_get_pid(WnckApplication *application)
+ {
+ 	GPid pid;
++	GList *windows;
++
+ 	if (NULL == application)
+ 		return (0);
+ 	pid = wnck_application_get_pid (application);
+ 	if (pid != 0)
+ 		return (pid);
+-	return (wnck_window_get_pid (WNCK_WINDOW (wnck_application_get_windows (application)->data)));
++	windows = wnck_application_get_windows (application);
++	if (NULL != windows && NULL != windows->data)
++		return (wnck_window_get_pid (WNCK_WINDOW (windows->data)));
++	return (0);
+ }
+ 
+ static gint
+@@ -135,6 +141,8 @@
+ 	App *app = apps_lookup_pid(apps, app_get_pid (application));
+ 
+ 	if (app == NULL)
++		app = apps_lookup_app(apps, application);
++	if (app == NULL)
+ 		return;
+ 	g_object_unref (app->icon);
+ 	g_array_remove_index (apps, (guint)(((size_t)app - (size_t)apps->data) / sizeof(App)));
+@@ -150,6 +158,21 @@
+ 	return (bsearch(&tapp, apps->data, apps->len, sizeof(App), app_pid_compare_fn));
+ }
+ 
++static App *
++apps_lookup_app (GArray *apps, WnckApplication *application)
++{
++	App *tapp;
++	guint i;
++
++	for (i = 0; i < apps->len; i++) {
++		tapp = &g_array_index (apps, App, i);
++		if (tapp->application == application)
++			return (tapp);
++	}
++
++	return (NULL);
++}
++
+ static void
+ application_opened (WnckScreen *screen __unused, WnckApplication *application, XtmAppManager *manager)
+ {
Index: x11/xfce4-taskmanager/files/patch-src_task-manager.c
===================================================================
--- x11/xfce4-taskmanager/files/patch-src_task-manager.c	(nonexistent)
+++ x11/xfce4-taskmanager/files/patch-src_task-manager.c	(working copy)
@@ -0,0 +1,70 @@
+--- src/task-manager.c	2018-06-03 18:43:41.000000000 +0300
++++ src/task-manager.c	2018-07-29 09:21:33.383945000 +0300
+@@ -22,6 +22,7 @@
+ #include <glib-object.h>
+ #include <glib/gi18n.h>
+ #include <gtk/gtk.h>
++#include <gmodule.h>
+ 
+ #include "task-manager.h"
+ #ifdef HAVE_WNCK
+@@ -125,12 +126,44 @@
+ static gchar *
+ pretty_cmdline (gchar *cmdline, gchar *comm)
+ {
+-	/* Use the printable range of 0x20-0x7E */
+-	const gchar *valid_chars = " !\"#$%&'()*+,-./0123456789:;<=>?@"
+-				   "ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`"
+-				   "abcdefghijklmnopqrstuvwxyz{|}~";
+-	gchar *text = g_strstrip (g_strcanon (g_strdup (cmdline), valid_chars, ' '));
+-	gsize text_size = (gsize)strlen (text);
++	gunichar c;
++	gchar *ch, *text_max, *text = g_strstrip (g_strdup (cmdline));
++	gsize csize, text_size = (gsize)strlen (text);
++
++	/* UTF-8 normalize. */
++	do {
++		for (ch = text, text_max = (text + text_size);
++		     text_max > ch;
++		     text_max = (text + text_size), ch = g_utf8_next_char(ch)) {
++			c = g_utf8_get_char_validated(ch, -1); /* If use (text_max - ch) - result is worse. */
++			if ((gunichar)-2 == c) {
++				text_size = (gsize)(ch - text);
++				(*ch) = 0;
++				break;
++			}
++			if ((gunichar)-1 == c) {
++				(*ch) = ' ';
++				continue;
++			}
++			csize = (gsize)g_unichar_to_utf8(c, NULL);
++
++			if (!g_unichar_isdefined(c) ||
++			    !g_unichar_isprint(c) ||
++			    (g_unichar_isspace(c) && (1 != csize || (' ' != (*ch) && '	' != (*ch)))) ||
++			    g_unichar_ismark(c) ||
++			    g_unichar_istitle(c) ||
++			    g_unichar_iswide(c) ||
++			    g_unichar_iszerowidth(c) ||
++			    g_unichar_iscntrl(c)) {
++				if (text_max < (ch + csize))
++					break;
++				memmove(ch, (ch + csize), (gsize)(text_max - (ch + csize)));
++				text_size -= csize;
++			}
++		}
++		text[text_size] = 0;
++	} while (!g_utf8_validate(text, (gssize)text_size, NULL));
++
+ 	if (!full_cmdline && text_size > 3)
+ 	{
+ 		/* Shorten full path to commands and wine applications */
+@@ -139,7 +172,7 @@
+ 			gchar *p = g_strstr_len (text, (gssize)text_size, comm);
+ 			if (p != NULL)
+ 			{
+-				g_strlcpy (text, p, text_size);
++				memmove (text, p, text_size);
+ 			}
+ 		}
+ 	}