diff --git a/400_xowa/src/gplx/xowa/Xoa_app_.java b/400_xowa/src/gplx/xowa/Xoa_app_.java
index 50a192847..d587e6499 100644
--- a/400_xowa/src/gplx/xowa/Xoa_app_.java
+++ b/400_xowa/src/gplx/xowa/Xoa_app_.java
@@ -30,8 +30,8 @@ public class Xoa_app_ {
 		}
 	}
 	public static final String		Name			= "xowa";
-	public static final int		Version_id		= 529;
-	public static final String		Version			= "4.5.7.1706";
+	public static final int		Version_id		= 530;
+	public static final String		Version			= "4.5.8.1707";
 	public static String	Build_date		= "2012-12-30 00:00:00";
 	public static String	Build_date_fmt	= "yyyy-MM-dd HH:mm:ss";
 	public static String	Op_sys_str;
diff --git a/400_xowa/src/gplx/xowa/addons/servers/https/Http_long_poll_cmd.java b/400_xowa/src/gplx/xowa/addons/servers/https/Http_long_poll_cmd.java
index 80d3476fb..d6e4e1707 100644
--- a/400_xowa/src/gplx/xowa/addons/servers/https/Http_long_poll_cmd.java
+++ b/400_xowa/src/gplx/xowa/addons/servers/https/Http_long_poll_cmd.java
@@ -17,7 +17,9 @@ package gplx.xowa.addons.servers.https; import gplx.*; import gplx.xowa.*; impor
 import gplx.core.envs.*;
 public class Http_long_poll_cmd implements gplx.xowa.htmls.bridges.Bridge_cmd_itm {
 	private final    List_adp msgs = List_adp_.New();
-	private boolean active;
+	private String prv_guid;
+	private long prv_start;
+	private long prv_timeout;
 
 	public void Init_by_app(Xoa_app app) {
 		app.Gui__cbk_mgr().Reg(Xog_cbk_wkr__http.Instance);
@@ -27,17 +29,30 @@ public class Http_long_poll_cmd implements gplx.xowa.htmls.bridges.Bridge_cmd_it
 			msgs.Add(msg);
 		}
 	}
+	// NOTE: this class is a singleton and only supports one user; need to track multiple requests by having http_server track incoming users
 	public String Exec(gplx.langs.jsons.Json_nde data) {
-		// NOTE: this class is a singleton and only supports one user; need to track multiple requests by having http_server track incoming users
+		// for each new request, update guid / start_time
+		String cur_guid = data.Get_as_str_or("guid", "");
+		long cur_timeout = data.Get_as_long_or("timeout", 5000);
 		synchronized (msgs) {
-			if (active) return "polling";
+			this.prv_guid = cur_guid;
+			this.prv_start = System_.Ticks();
+			this.prv_timeout = cur_timeout;
 		}
+
 		// check if already active; if so, return;
 		while (true) {
+			synchronized (msgs) {
+				if (!String_.Eq(cur_guid, prv_guid))
+					return String_.Format("long-poll ignored: new long-poll arrived: prv={0} cur={1}", prv_guid, cur_guid);
+
+				if (System_.Ticks__elapsed_in_frac(prv_start) > prv_timeout)
+					return String_.Format("long-poll ignored: old long-poll timed-out: guid={0}", cur_guid);
+			}
+
 			// get msgs in queue
 			int msgs_len = 0;
 			synchronized (msgs) {
-				active = true;
 				msgs_len = msgs.Len();
 			}
 
@@ -55,7 +70,6 @@ public class Http_long_poll_cmd implements gplx.xowa.htmls.bridges.Bridge_cmd_it
 		String[] rv = null;
 		synchronized (msgs) {
 			rv = msgs.To_str_ary_and_clear();
-			active = false;
 		}
 		return String_.Concat_lines_nl(rv);
 	}
diff --git a/400_xowa/src/gplx/xowa/apps/boots/Xoa_cmd_arg_mgr.java b/400_xowa/src/gplx/xowa/apps/boots/Xoa_cmd_arg_mgr.java
index 522312475..39e5319b1 100644
--- a/400_xowa/src/gplx/xowa/apps/boots/Xoa_cmd_arg_mgr.java
+++ b/400_xowa/src/gplx/xowa/apps/boots/Xoa_cmd_arg_mgr.java
@@ -75,7 +75,7 @@ public class Xoa_cmd_arg_mgr {
 		, Gfo_cmd_arg_itm_.opt_("server_port_recv").Example_("55000").Note_("applies to --app_mode server; port where xowa server will receive messages; clients should send messages to this port")
 		, Gfo_cmd_arg_itm_.opt_("server_port_send").Example_("55001").Note_("applies to --app_mode server; port where xowa server will send messages; clients should listen for messages from this port")
 		, Gfo_cmd_arg_itm_.opt_("http_server_port").Example_("8080").Note_("applies to --app_mode http_server; port used by http_server; default is 8080")
-		, Gfo_cmd_arg_itm_.opt_("http_server_home").Example_("home/wiki/Main_Page").Note_("applies to --app_mode http_server; default home page for root address. EX: navigating to localhost:8080 will navigate to localhost:8080/home/wiki/Main_Page")
+		, Gfo_cmd_arg_itm_.opt_("http_server_home").Example_("home/wiki/Main_Page").Note_("applies to --app_mode http_server; default home page for root address. EX: navigating to localhost:8080 will navigate to localhost:8080/home/wiki/Main_Page. To navigate to a wiki's main page, use the domain name only. EX: --http_server_home en.wikipedia.org")
 		, Gfo_cmd_arg_itm_.opt_("http_server.max_clients").Example_("15").Note_("applies to --app_mode http_server; limits maximum number of concurrent connections; default is 0 (no limit)")
 		, Gfo_cmd_arg_itm_.opt_("http_server.max_clients_timeout").Example_("50").Note_("applies to --app_mode http_server; time in milliseconds to wait before checking again to see if a connection is free; default is 50 (wait 50 ms)")
 		, Gfo_cmd_arg_itm_.sys_("show_license").Dflt_(true)
diff --git a/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_wkr.java b/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_wkr.java
index 70782580b..5af6225b1 100644
--- a/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_wkr.java
+++ b/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_wkr.java
@@ -161,13 +161,16 @@ class Xosrv_http_wkr_ {
 	public static void Write_response_as_html(Http_client_wtr client_wtr, boolean cross_domain, String html) {Write_response_as_html(client_wtr, cross_domain, Bry_.new_u8(html));}
 	public static void Write_response_as_html(Http_client_wtr client_wtr, boolean cross_domain, byte[] html) {
 		try{
-			client_wtr.Write_bry(Rsp__http_ok);
 			// TODO_OLD: add command-line argument to allow testing from local file
 			// if (cross_domain)
 			//	client_wtr.Write_str("Access-Control-Allow-Origin: *\n");	// No 'Access-Control-Allow-Origin' header is present on the requested resource.
-			client_wtr.Write_bry(Rsp__content_type_html);
-			client_wtr.Write_bry(Byte_ascii.Nl_bry);
-			client_wtr.Write_bry(html);
+			client_wtr.Write_bry
+			( Bry_.Add
+			(   Rsp__http_ok
+			,   Rsp__content_type_html
+			,   Byte_ascii.Nl_bry
+			,   html
+			));
 		} catch (Exception err) {
 			client_wtr.Write_str("Site not found. Check address please, or see console log.\n" + Err_.Message_lang(err));
 			client_wtr.Rls();
diff --git a/xowa.home.version b/xowa.home.version
index 8ae11c164..bee1609cc 100644
--- a/xowa.home.version
+++ b/xowa.home.version
@@ -1 +1 @@
-download_central update
+v4.5.7.1706