diff --git a/WP-GPX-Maps.js b/WP-GPX-Maps.js
index 1bcfbbd..ab771b6 100644
--- a/WP-GPX-Maps.js
+++ b/WP-GPX-Maps.js
@@ -145,19 +145,62 @@ function _wpgpxmaps(params)
 	
 	var mapWidth = el_map.style.width;
 	
+	
+	var mapTypeIds = [];
+	for(var type in google.maps.MapTypeId) {
+		mapTypeIds.push(google.maps.MapTypeId[type]);
+	}
+	mapTypeIds.push("OSM1");
+	mapTypeIds.push("OSM2");
+	mapTypeIds.push("OSM3");
+	
 	switch (mapType)
 	{
 		case 'TERRAIN': { mapType = google.maps.MapTypeId.TERRAIN; break;}
 		case 'SATELLITE': { mapType = google.maps.MapTypeId.SATELLITE; break;}
 		case 'ROADMAP': { mapType = google.maps.MapTypeId.ROADMAP; break;}
+		case 'OSM1': { mapType = "OSM1"; break;}
+		case 'OSM2': { mapType = "OSM2"; break;}
+		case 'OSM3': { mapType = "OSM3"; break;}
 		default: { mapType = google.maps.MapTypeId.HYBRID; break;}
 	}
-	
-	var mapOptions = {
+
+	var map = new google.maps.Map(el_map, {
 		mapTypeId: mapType,
-		scrollwheel: false
-	};
-	var map = new google.maps.Map(el_map, mapOptions); 
+		scrollwheel: false,
+		mapTypeControlOptions: {
+			style: google.maps.MapTypeControlStyle.DROPDOWN_MENU,
+			mapTypeIds: mapTypeIds
+		}
+	}); 
+										
+	map.mapTypes.set("OSM1", new google.maps.ImageMapType({
+		getTileUrl: function(coord, zoom) {
+			return "http://tile.openstreetmap.org/" + zoom + "/" + coord.x + "/" + coord.y + ".png";
+		},
+		tileSize: new google.maps.Size(256, 256),
+		name: "Open Street Map",
+		maxZoom: 18
+	}));
+	
+	map.mapTypes.set("OSM2", new google.maps.ImageMapType({
+		getTileUrl: function(coord, zoom) {
+			return "http://a.tile.opencyclemap.org/cycle/" + zoom + "/" + coord.x + "/" + coord.y + ".png";
+		},
+		tileSize: new google.maps.Size(256, 256),
+		name: "Open Cycle Map",
+		maxZoom: 18
+	}));
+	
+	map.mapTypes.set("OSM3", new google.maps.ImageMapType({
+		getTileUrl: function(coord, zoom) {
+			return "http://toolserver.org/tiles/hikebike/" + zoom + "/" + coord.x + "/" + coord.y + ".png";
+		},
+		tileSize: new google.maps.Size(256, 256),
+		name: "Hike & Bike",
+		maxZoom: 18
+	}));
+
 	var bounds = new google.maps.LatLngBounds();
 	
 	// Print WayPoints
diff --git a/readme.txt b/readme.txt
index 0a4ac08..33fad16 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1,10 +1,10 @@
 === WP GPX Maps ===
 Contributors: bastianonm
 Donate link: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=8VHWLRW6JBTML
-Tags: maps, gpx, gps, graph, chart, google maps, google chart, track, garmin, image, nextgen-gallery, nextgen, exif
+Tags: maps, gpx, gps, graph, chart, google maps, google chart, track, garmin, image, nextgen-gallery, nextgen, exif, OpenStreetMap, OpenCycleMap, Hike&Bike.
 Requires at least: 2.0.0
 Tested up to: 3.3
-Stable tag: 1.1.12
+Stable tag: 1.1.13
 License: GPLv2 or later
 
 Draws a gpx track with altitude graph
@@ -109,6 +109,9 @@ Yes!
 2. Admin area - Settings
 
 == Changelog ==
+= 1.1.13 =
+* added new types of maps: Open Street Map, Open Cycle Map, Hike & Bike.
+* fixed nextgen gallery caching problem 
 = 1.1.12 =
 * nextgen gallery display bug fixes
 = 1.1.11 =
@@ -173,6 +176,7 @@ Yes!
 * Initial release
 
 == Upgrade Notice ==
+= 1.1.13 =
 = 1.1.12 =
 = 1.1.11 =
 = 1.1.10 =
diff --git a/wp-gpx-maps.php b/wp-gpx-maps.php
index 63e8b1a..9267330 100644
--- a/wp-gpx-maps.php
+++ b/wp-gpx-maps.php
@@ -3,7 +3,7 @@
 Plugin Name: WP-GPX-Maps
 Plugin URI: http://www.darwinner.it/
 Description: Draws a gpx track with altitude graph
-Version: 1.1.12
+Version: 1.1.13
 Author: Bastianon Massimo
 Author URI: http://www.pedemontanadelgrappa.it/
 License: GPL
@@ -46,7 +46,7 @@ function enqueue_WP_GPX_Maps_scripts()
 		google.load('visualization', '1', {'packages':['corechart']});
 		google.load("maps", "3", {other_params: 'sensor=false'});
 	</script>
-	<script type='text/javascript' src='<?php echo plugins_url('/WP-GPX-Maps.js', __FILE__) ?>?ver=1.1.12'></script>
+	<script type='text/javascript' src='<?php echo plugins_url('/WP-GPX-Maps.js', __FILE__) ?>?ver=1.1.13'></script>
 <?php
 }
 
@@ -97,7 +97,9 @@ function handle_WP_GPX_Maps_Shortcodes($attr, $content='')
 
 	$r = rand(1,5000000);
 	
-	$cacheFileName = md5(serialize($attr));
+	$cacheFileName = "$gpx,$w,$mh,$mt,$gh,$showW,$donotreducegpx,$pointsoffset,$showSpeed,$uom";
+
+	$cacheFileName = md5($cacheFileName);
 	
 	$gpxcache = gpxCacheFolderPath();
 	
@@ -117,28 +119,12 @@ function handle_WP_GPX_Maps_Shortcodes($attr, $content='')
 			$points_maps = $cache_obj["points_maps"];
 			$points_graph = $cache_obj["points_graph"];
 			$waypoints = $cache_obj["waypoints"];
-			$ngimgs_data = $cache_obj["ngimgs"];
 		} catch (Exception $e) {
 			$points_maps= '';
 			$points_graph= '';
 			$waypoints= '';
-			$ngimgs_data='';
 		}
 	}
-	
-	if ($ngimgs_data == '' && ( $ngGalleries != '' || $ngImages != '' ))
-	{
-		$ngimgs = getNGGalleryImages($ngGalleries,$ngImages);
-		
-		$ngimgs_data ='';
-		
-		foreach ($ngimgs as $img) {		
-			$data = $img['data'];
-			$data = str_replace("\n","",$data);
-			$ngimgs_data .= '<span lat="'.$img['lat'].'" lon="'.$img['lon'].'">'.$data.'</span>';
-		}
-		
-	}
 
 	if ($points_maps == '' && $gpx != '')
 	{
@@ -226,13 +212,28 @@ function handle_WP_GPX_Maps_Shortcodes($attr, $content='')
 
 	}
 	
-		@file_put_contents($gpxcache, 
-					   serialize(array( "points_maps" => $points_maps, 
-										"points_graph" => $points_graph, 
-										"waypoints" => $waypoints,
-										"ngimgs" => $ngimgs_data)
-								), 
-					   LOCK_EX);
+	$ngimgs_data = '';
+	if ( $ngGalleries != '' || $ngImages != '' )
+	{
+		$ngimgs = getNGGalleryImages($ngGalleries,$ngImages);
+		
+		$ngimgs_data ='';
+		
+		foreach ($ngimgs as $img) {		
+			$data = $img['data'];
+			$data = str_replace("\n","",$data);
+			$ngimgs_data .= '<span lat="'.$img['lat'].'" lon="'.$img['lon'].'">'.$data.'</span>';
+		}
+		
+	}
+	
+	@file_put_contents($gpxcache, 
+				   serialize(array( "points_maps" => $points_maps, 
+									"points_graph" => $points_graph, 
+									"waypoints" => $waypoints)
+							), 
+				   LOCK_EX);
+				   
 	@chmod($gpxcache,0755);	
 	
 	$output = '
diff --git a/wp-gpx-maps_admin_settings.php b/wp-gpx-maps_admin_settings.php
index 3d4446b..ab0eb94 100644
--- a/wp-gpx-maps_admin_settings.php
+++ b/wp-gpx-maps_admin_settings.php
@@ -79,6 +79,9 @@
 				<input type="radio" name="wpgpxmaps_map_type" value="ROADMAP" <?php if ($t == 'ROADMAP') echo 'checked'; ?>> ROADMAP: normal street map.<br />
 				<input type="radio" name="wpgpxmaps_map_type" value="SATELLITE" <?php if ($t == 'SATELLITE') echo 'checked'; ?>> SATELLITE: satellite images.<br />
 				<input type="radio" name="wpgpxmaps_map_type" value="TERRAIN" <?php if ($t == 'TERRAIN') echo 'checked'; ?>> TERRAIN: maps with physical features such as terrain and vegetation.<br />
+				<input type="radio" name="wpgpxmaps_map_type" value="OSM1" <?php if ($t == 'OSM1') echo 'checked'; ?>> Open Street Map<br />
+				<input type="radio" name="wpgpxmaps_map_type" value="OSM2" <?php if ($t == 'OSM2') echo 'checked'; ?>> Open Cycle Map<br />
+				<input type="radio" name="wpgpxmaps_map_type" value="OSM3" <?php if ($t == 'OSM3') echo 'checked'; ?>> Hike & Bike<br />				
 			</td>
 		</tr>