it's debug season for upcoming dwm 5.8, so only use this if you really want to run experimental code or debug code

BUGS

@@ -44,3 +44,16 @@ Donald Allen reported this:
 starting emacs from dmenu in archlinux results in missing configure of emacs, but mod1-space or mod1-shift-space fix this problem. this problem is new and did not happen in 1.6 xorg servers
 
 Starting emacs from xterm doesnt show this problem, he uses tag 8 for emacs
+
+---
+
+2009/12/7 Alexandr Krylovskiy <wing_AT_tversu.ru>: 
+>  Fullscreen mode with flash applications (youtube, for example) doesn't 
+> work properly neither in tiled nor in floating mode. 
+>  Fullscreen window closes immediately after opening. 
+
+This is a known bug (for some curiosity I received the same report via 
+privmail from 2 other people within one week, really strange). 
+The quick fix is commenting out the code in lines 817/818 in hg tip 
+dwm. I cannot confirm this has no side effects (I think it does) and I 
+will address this issue shortly with a real fix. 

config.mk

@@ -20,10 +20,10 @@ LIBS = -L/usr/lib -lc -L${X11LIB} -lX11 ${XINERAMALIBS}
 
 # flags
 CPPFLAGS = -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
-#CFLAGS = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS}
-CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
-#LDFLAGS = -g ${LIBS}
-LDFLAGS = -s ${LIBS}
+CFLAGS = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS}
+#CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
+LDFLAGS = -g ${LIBS}
+#LDFLAGS = -s ${LIBS}
 
 # Solaris
 #CFLAGS = -fast ${INCS} -DVERSION=\"${VERSION}\"

dwm.c

@@ -41,6 +41,7 @@
 #endif /* XINERAMA */
 
 /* macros */
+#define D                       if(1)
 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask))
 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
@@ -814,8 +815,8 @@ void
 focus(Client *c) {
 	if(!c || !ISVISIBLE(c))
 		for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
-	if(selmon->sel)
-		unfocus(selmon->sel);
+//	if(selmon->sel)
+//		unfocus(selmon->sel);
 	if(c) {
 		if(c->mon != selmon)
 			selmon = c->mon;
@@ -1388,13 +1389,28 @@ restack(Monitor *m) {
 void
 run(void) {
 	XEvent ev;
-
+	static const char *evname[LASTEvent] = {
+		[ButtonPress] = "buttonpress",
+		[ConfigureRequest] = "configurerequest",
+		[ConfigureNotify] = "configurenotify",
+		[DestroyNotify] = "destroynotify",
+		[EnterNotify] = "enternotify",
+		[Expose] = "expose",
+		[FocusIn] = "focusin",
+		[KeyPress] = "keypress",
+		[MappingNotify] = "mappingnotify",
+		[MapRequest] = "maprequest",
+		[PropertyNotify] = "propertynotify",
+		[UnmapNotify] = "unmapnotify"
+	};
 	/* main event loop */
 	XSync(dpy, False);
-	while(running && !XNextEvent(dpy, &ev))
+	while(running && !XNextEvent(dpy, &ev)) {
+		D fprintf(stderr, "run event %s\n", evname[ev.type]);
 		if(handler[ev.type])
 			handler[ev.type](&ev); /* call handler */
 	}
+}
 
 void
 scan(void) {