diff --git a/client.c b/client.c
index 91f47650..691ace31 100644
--- a/client.c
+++ b/client.c
@@ -78,8 +78,8 @@ client_get_lock(char *lockfile)
 	if ((lockfd = open(lockfile, O_WRONLY|O_CREAT, 0600)) == -1)
 		fatal("open failed");
 
-	if (flock(lockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
-		while (flock(lockfd, LOCK_EX) == -1 && errno == EINTR)
+	if (lockf(lockfd, F_TLOCK, 0) == -1 && errno == EAGAIN) {
+		while (lockf(lockfd, F_LOCK, 0) == -1 && errno == EINTR)
 			/* nothing */;
 		close(lockfd);
 		return (-1);
diff --git a/cmd-choose-tree.c b/cmd-choose-tree.c
index e2d382b3..a9b6ffbc 100644
--- a/cmd-choose-tree.c
+++ b/cmd-choose-tree.c
@@ -89,10 +89,7 @@ cmd_choose_tree_exec(struct cmd *self, struct cmd_q *cmdq)
 		return (CMD_RETURN_ERROR);
 	}
 
-	if ((s = c->session) == NULL)
-		return (CMD_RETURN_ERROR);
-
-	if ((wl = cmd_find_window(cmdq, args_get(args, 't'), NULL)) == NULL)
+	if ((wl = cmd_find_window(cmdq, args_get(args, 't'), &s)) == NULL)
 		return (CMD_RETURN_ERROR);
 
 	if (window_pane_set_mode(wl->window->active, &window_choose_mode) != 0)
@@ -231,9 +228,12 @@ windows_only:
 	free(final_win_template_last);
 
 	window_choose_ready(wl->window->active, cur_win, NULL);
+	window_choose_collapse_all(wl->window->active);
 
-	if (args_has(args, 'u'))
+	if (args_has(args, 'u')) {
 		window_choose_expand_all(wl->window->active);
+		window_choose_set_current(wl->window->active, cur_win);
+	}
 
 	return (CMD_RETURN_NORMAL);
 }
diff --git a/format.c b/format.c
index fa2dd0b2..7de819a9 100644
--- a/format.c
+++ b/format.c
@@ -288,7 +288,7 @@ format_session(struct format_tree *ft, struct session *s)
 		format_add(ft, "session_group", "%u", session_group_index(sg));
 
 	t = s->creation_time.tv_sec;
-	format_add(ft, "session_created", "%ld", (long) t);
+	format_add(ft, "session_created", "%lld", (long long) t);
 	tim = ctime(&t);
 	*strchr(tim, '\n') = '\0';
 	format_add(ft, "session_created_string", "%s", tim);
@@ -314,13 +314,13 @@ format_client(struct format_tree *ft, struct client *c)
 	format_add(ft, "client_termname", "%s", c->tty.termname);
 
 	t = c->creation_time.tv_sec;
-	format_add(ft, "client_created", "%ld", (long) t);
+	format_add(ft, "client_created", "%lld", (long long) t);
 	tim = ctime(&t);
 	*strchr(tim, '\n') = '\0';
 	format_add(ft, "client_created_string", "%s", tim);
 
 	t = c->activity_time.tv_sec;
-	format_add(ft, "client_activity", "%ld", (long) t);
+	format_add(ft, "client_activity", "%lld", (long long) t);
 	tim = ctime(&t);
 	*strchr(tim, '\n') = '\0';
 	format_add(ft, "client_activity_string", "%s", tim);
diff --git a/job.c b/job.c
index 33cdc76d..b2c2251c 100644
--- a/job.c
+++ b/job.c
@@ -143,8 +143,8 @@ job_write_callback(unused struct bufferevent *bufev, void *data)
 	struct job	*job = data;
 	size_t		 len = EVBUFFER_LENGTH(EVBUFFER_OUTPUT(job->event));
 
-	log_debug("job write %p: %s, pid %ld, output left %lu", job, job->cmd,
-		    (long) job->pid, (unsigned long) len);
+	log_debug("job write %p: %s, pid %ld, output left %zu", job, job->cmd,
+		    (long) job->pid, len);
 
 	if (len == 0) {
 		shutdown(job->fd, SHUT_WR);
diff --git a/server-client.c b/server-client.c
index 84633296..1c15a555 100644
--- a/server-client.c
+++ b/server-client.c
@@ -514,8 +514,10 @@ server_client_loop(void)
 
 		w->flags &= ~WINDOW_REDRAW;
 		TAILQ_FOREACH(wp, &w->panes, entry) {
-			server_client_check_focus(wp);
-			server_client_check_resize(wp);
+			if (wp->fd != -1) {
+				server_client_check_focus(wp);
+				server_client_check_resize(wp);
+			}
 			wp->flags &= ~PANE_REDRAW;
 		}
 	}
@@ -527,7 +529,7 @@ server_client_check_resize(struct window_pane *wp)
 {
 	struct winsize	ws;
 
-	if (wp->fd == -1 || !(wp->flags & PANE_RESIZE))
+	if (!(wp->flags & PANE_RESIZE))
 		return;
 
 	memset(&ws, 0, sizeof ws);
diff --git a/server-fn.c b/server-fn.c
index 566925f0..7ef64138 100644
--- a/server-fn.c
+++ b/server-fn.c
@@ -283,6 +283,7 @@ server_kill_window(struct window *w)
 		if (options_get_number(&s->options, "renumber-windows"))
 			session_renumber_windows(s);
 	}
+	recalculate_sizes();
 }
 
 int
diff --git a/tmux.h b/tmux.h
index f0b9edf0..d1033110 100644
--- a/tmux.h
+++ b/tmux.h
@@ -2253,6 +2253,8 @@ struct window_choose_data	*window_choose_add_item(struct window_pane *,
 			struct client *, struct winlink *, const char *,
 			const char *, u_int);
 void	window_choose_expand_all(struct window_pane *);
+void	window_choose_collapse_all(struct window_pane *);
+void	window_choose_set_current(struct window_pane *, u_int);
 
 /* names.c */
 void		 queue_window_name(struct window *);
diff --git a/window-choose.c b/window-choose.c
index 3c68d101..5ed85f0e 100644
--- a/window-choose.c
+++ b/window-choose.c
@@ -44,7 +44,6 @@ void	window_choose_scroll_down(struct window_pane *);
 
 void	window_choose_collapse(struct window_pane *, struct session *);
 void	window_choose_expand(struct window_pane *, struct session *, u_int);
-void	window_choose_collapse_all(struct window_pane *);
 
 enum window_choose_input_type {
 	WINDOW_CHOOSE_NORMAL = -1,
@@ -102,8 +101,7 @@ window_choose_add(struct window_pane *wp, struct window_choose_data *wcd)
 }
 
 void
-window_choose_ready(struct window_pane *wp, u_int cur,
-    void (*callbackfn)(struct window_choose_data *))
+window_choose_set_current(struct window_pane *wp, u_int cur)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;
@@ -112,12 +110,22 @@ window_choose_ready(struct window_pane *wp, u_int cur,
 	if (data->selected > screen_size_y(s) - 1)
 		data->top = ARRAY_LENGTH(&data->list) - screen_size_y(s);
 
+	window_choose_redraw_screen(wp);
+}
+
+void
+window_choose_ready(struct window_pane *wp, u_int cur,
+    void (*callbackfn)(struct window_choose_data *))
+{
+	struct window_choose_mode_data	*data = wp->modedata;
+
 	data->callbackfn = callbackfn;
 	if (data->callbackfn == NULL)
 		data->callbackfn = window_choose_default_callback;
 
 	ARRAY_CONCAT(&data->old_list, &data->list);
 
+	window_choose_set_current(wp, cur);
 	window_choose_collapse_all(wp);
 }