diff --git a/cmd-find.c b/cmd-find.c
index 46551e2d..fd119cb2 100644
--- a/cmd-find.c
+++ b/cmd-find.c
@@ -989,13 +989,13 @@ cmd_find_target(struct cmd_find_state *fs, struct cmd_find_state *current,
 	/* Find current state. */
 	if (server_check_marked() && (flags & CMD_FIND_DEFAULT_MARKED)) {
 		fs->current = &marked_pane;
-		log_debug("    current is marked pane");
+		log_debug("%s: current is marked pane", __func__);
 	} else if (cmd_find_valid_state(&item->current)) {
 		fs->current = &item->current;
-		log_debug("    current is from queue");
+		log_debug("%s: current is from queue", __func__);
 	} else {
 		fs->current = current;
-		log_debug("    current is from argument");
+		log_debug("%s: current is from argument", __func__);
 	}
 	if (!cmd_find_empty_state(fs->current) &&
 	    !cmd_find_valid_state(fs->current))
@@ -1206,7 +1206,7 @@ current:
 
 error:
 	fs->current = NULL;
-	log_debug("    error");
+	log_debug("%s: error", __func__);
 
 	free(copy);
 	return (-1);
diff --git a/cmd-queue.c b/cmd-queue.c
index 5056fffc..24fd0c56 100644
--- a/cmd-queue.c
+++ b/cmd-queue.c
@@ -112,6 +112,8 @@ cmdq_remove(struct cmdq_item *item)
 		cmd_list_free(item->cmdlist);
 
 	TAILQ_REMOVE(item->queue, item, entry);
+
+	free((void *)item->name);
 	free(item);
 }
 
@@ -147,10 +149,15 @@ cmdq_get_command(struct cmd_list *cmdlist, struct cmd_find_state *current,
 	struct cmdq_item	*item, *first = NULL, *last = NULL;
 	struct cmd		*cmd;
 	u_int			 group = cmdq_next_group();
+	char			*tmp;
 
 	TAILQ_FOREACH(cmd, &cmdlist->list, qentry) {
+		xasprintf(&tmp, "command[%s]", cmd->entry->name);
+
 		item = xcalloc(1, sizeof *item);
+		item->name = tmp;
 		item->type = CMDQ_COMMAND;
+
 		item->group = group;
 		item->flags = flags;
 
@@ -220,12 +227,17 @@ out:
 
 /* Get a callback for the command queue. */
 struct cmdq_item *
-cmdq_get_callback(cmdq_cb cb, void *data)
+cmdq_get_callback1(const char *name, cmdq_cb cb, void *data)
 {
 	struct cmdq_item	*item;
+	char			*tmp;
+
+	xasprintf(&tmp, "callback[%s]", name);
 
 	item = xcalloc(1, sizeof *item);
+	item->name = tmp;
 	item->type = CMDQ_CALLBACK;
+
 	item->group = 0;
 	item->flags = 0;
 
@@ -289,8 +301,8 @@ cmdq_next(struct client *c)
 		item = TAILQ_FIRST(queue);
 		if (item == NULL)
 			break;
-		log_debug("%s %s: type %d, flags %x", __func__, name,
-		    item->type, item->flags);
+		log_debug("%s %s: %s (%d), flags %x", __func__, name,
+		    item->name, item->type, item->flags);
 
 		/*
 		 * Any item with the waiting flag set waits until an external
diff --git a/grid.c b/grid.c
index d0a28463..9619c4fe 100644
--- a/grid.c
+++ b/grid.c
@@ -59,12 +59,46 @@ static size_t	grid_string_cells_bg(const struct grid_cell *, int *);
 static void	grid_string_cells_code(const struct grid_cell *,
 		    const struct grid_cell *, char *, size_t, int);
 
+/* Set cell as extended. */
+static struct grid_cell *
+grid_extended_cell(struct grid_line *gl, struct grid_cell_entry *gce,
+    const struct grid_cell *gc)
+{
+	struct grid_cell	*gcp;
+
+	gl->flags |= GRID_LINE_EXTENDED;
+
+	if (~gce->flags & GRID_FLAG_EXTENDED) {
+		gl->extddata = xreallocarray(gl->extddata, gl->extdsize + 1,
+		    sizeof *gl->extddata);
+		gce->offset = gl->extdsize++;
+		gce->flags = gc->flags | GRID_FLAG_EXTENDED;
+	}
+	if (gce->offset >= gl->extdsize)
+		fatalx("offset too big");
+
+	gcp = &gl->extddata[gce->offset];
+	memcpy(gcp, gc, sizeof *gcp);
+	return (gcp);
+}
+
 /* Copy default into a cell. */
 static void
 grid_clear_cell(struct grid *gd, u_int px, u_int py, u_int bg)
 {
-	gd->linedata[py].celldata[px] = grid_default_entry;
-	gd->linedata[py].celldata[px].data.bg = bg;
+	struct grid_line	*gl = &gd->linedata[py];
+	struct grid_cell_entry	*gce = &gl->celldata[px];
+	struct grid_cell	*gc;
+
+	memcpy(gce, &grid_default_cell, sizeof *gce);
+	if (bg & COLOUR_FLAG_RGB) {
+		gc = grid_extended_cell(gl, gce, &grid_default_cell);
+		gc->bg = bg;
+	} else {
+		if (bg & COLOUR_FLAG_256)
+			gce->flags |= GRID_FLAG_BG256;
+		gce->data.bg = bg;
+	}
 }
 
 /* Check grid y position. */
@@ -322,7 +356,6 @@ grid_set_cell(struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
 {
 	struct grid_line	*gl;
 	struct grid_cell_entry	*gce;
-	struct grid_cell 	*gcp;
 	int			 extended;
 
 	if (grid_check_y(gd, py) != 0)
@@ -339,23 +372,12 @@ grid_set_cell(struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
 	extended = (gce->flags & GRID_FLAG_EXTENDED);
 	if (!extended && (gc->data.size != 1 || gc->data.width != 1))
 		extended = 1;
-	if (!extended && ((gc->fg & COLOUR_FLAG_RGB) ||
-	    (gc->bg & COLOUR_FLAG_RGB)))
+	if (!extended && (gc->fg & COLOUR_FLAG_RGB))
+		extended = 1;
+	if (!extended && (gc->bg & COLOUR_FLAG_RGB))
 		extended = 1;
 	if (extended) {
-		gl->flags |= GRID_LINE_EXTENDED;
-
-		if (~gce->flags & GRID_FLAG_EXTENDED) {
-			gl->extddata = xreallocarray(gl->extddata,
-			    gl->extdsize + 1, sizeof *gl->extddata);
-			gce->offset = gl->extdsize++;
-			gce->flags = gc->flags | GRID_FLAG_EXTENDED;
-		}
-
-		if (gce->offset >= gl->extdsize)
-			fatalx("offset too big");
-		gcp = &gl->extddata[gce->offset];
-		memcpy(gcp, gc, sizeof *gcp);
+		grid_extended_cell(gl, gce, gc);
 		return;
 	}
 
diff --git a/screen-write.c b/screen-write.c
index 95caabce..d5fc1dee 100644
--- a/screen-write.c
+++ b/screen-write.c
@@ -130,6 +130,7 @@ screen_write_flush(struct screen_write_ctx *ctx)
 		if (dirty == ctx->dirty)
 			break;
 	}
+	ctx->dirty = 0;
 
 	s->cx = cx;
 	s->cy = cy;
diff --git a/tmux.h b/tmux.h
index ed349330..519057e7 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1241,6 +1241,7 @@ enum cmdq_type {
 /* Command queue item. */
 typedef enum cmd_retval (*cmdq_cb) (struct cmdq_item *, void *);
 struct cmdq_item {
+	const char		*name;
 	struct cmdq_list	*queue;
 	struct cmdq_item	*next;
 
@@ -1781,7 +1782,8 @@ char		*cmd_list_print(struct cmd_list *);
 /* cmd-queue.c */
 struct cmdq_item *cmdq_get_command(struct cmd_list *, struct cmd_find_state *,
 		     struct mouse_event *, int);
-struct cmdq_item *cmdq_get_callback(cmdq_cb, void *);
+#define cmdq_get_callback(cb, data) cmdq_get_callback1(#cb, cb, data)
+struct cmdq_item *cmdq_get_callback1(const char *, cmdq_cb, void *);
 void		 cmdq_insert_after(struct cmdq_item *, struct cmdq_item *);
 void		 cmdq_append(struct client *, struct cmdq_item *);
 void printflike(3, 4) cmdq_format(struct cmdq_item *, const char *,
diff --git a/window.c b/window.c
index 8b215d78..18212098 100644
--- a/window.c
+++ b/window.c
@@ -985,7 +985,7 @@ window_pane_read_callback(__unused struct bufferevent *bufev, void *data)
 
 	input_parse(wp);
 
-	wp->pipe_off = size;
+	wp->pipe_off = EVBUFFER_LENGTH(evb);
 }
 
 static void