diff --git a/core/to_source_code.js b/core/to_source_code.js
index 3822a3b6..85ea1499 100644
--- a/core/to_source_code.js
+++ b/core/to_source_code.js
@@ -40,6 +40,14 @@ function to_source_code({value, indent="", function_names=false, newObject_paths
             return value.to_source_code(new_args)
         }
         else if (value === window)     { return "window"  } //too many weird values in there and too slow so punt.
+        else if (window.Picture && Picture.is_mat(value)){ //we can't and probably shouldn't attempt to print out a readable mat here,
+                                          //so just print a string to let a user know what it is in the inspector
+                                          //without this, bad bug happens when inspecting Jobs that have taken a picture and
+                                          //put it in a user_data variable
+            let result = "Mat (picture) of: width: " +  Picture.mat_width(value) +
+                         " height: "  + Picture.mat_height(value)
+            return result
+        }
         else if (typeof(value) == "object"){//beware if we didn't catch arrays above this would hit
                                             //assumes at this point we just have a lit obj.
             return to_source_code_lit_obj(arguments[0])
diff --git a/picture1.js b/picture1.js
index 002d8769..f09e7ff8 100644
--- a/picture1.js
+++ b/picture1.js
@@ -427,10 +427,10 @@ var Picture = class Picture{
         else if(typeof(video_id) == "string") { 
       	  	video_elt = value_of_path(video_id) 
           	if(video_elt == undefined){
-                let vid_callback = function() {
+                let show_video_callback = function() {
                		                    Picture.take_picture({video_id: video_id, width: width, height: height, callback: callback})
                                    }
-                Picture.show_video({video_id: video_id, camera_id: camera_id, width: width, height: height, visible: false, callback: vid_callback})
+                Picture.show_video({video_id: video_id, camera_id: camera_id, width: width, height: height, visible: false, callback: show_video_callback})
                 return
               //a video show window will pop up but the below code won't be able to return its mat.
              /*let the_html = '<video id="' + video_id + 
@@ -492,7 +492,9 @@ var Picture = class Picture{
     //type can be null (any mat type), "rgba", "gray", or a cv type number.
     //returns a boolean
     static is_mat(mat, type=null) {
-         if(mat instanceof cv.Mat) {
+         if((typeof(mat) === "object") &&
+            (typeof(window.cv) === "object") && //just in case cv is not initialized yet, don't have in screw up to_source_code and inspect
+             (mat instanceof cv.Mat)) {
              let mat_type = mat.type()
              switch (type) {
                  case null:   return true //mat can be of any mat_type
diff --git a/splash_screen.js b/splash_screen.js
index f26eaf98..20d47dcc 100644
--- a/splash_screen.js
+++ b/splash_screen.js
@@ -23,7 +23,7 @@ var SplashScreen = class SplashScreen {
             let the_tut_name = SplashScreen.splash_screen_tutorial_label_to_name(the_tut_label)
             let the_option_elt
             for(let an_option_elt of splash_screen_which_tutorial_id.children){
-                if(an_option_elt.innerText === the_tut_label){
+                if(an_option_elt.innerText.includes(the_tut_name)){ //beware, race condition on WinOS can cause a problem here
                     the_option_elt = an_option_elt
                     break;
                 }
@@ -53,7 +53,7 @@ var SplashScreen = class SplashScreen {
             x: 320, //same as dexter ui on purpose so that dui will "cover up" the splash screen.
             y: 100,
             width: 380, //380 is splash screen width 480,
-            height: 315,
+            height: 330,
             background_color: "#bae5fe", // pastel green: "#e7ffef",
             callback: "SplashScreen.show_splash_screen_cb",
             content:
diff --git a/tutorials/dexter_ui_tutorial.dde b/tutorials/dexter_ui_tutorial.dde
index 85f5eec5..3e7c05a9 100644
--- a/tutorials/dexter_ui_tutorial.dde
+++ b/tutorials/dexter_ui_tutorial.dde
@@ -50,8 +50,7 @@ dui_tour.addSteps([
           is one easy way to accomplish these goals.`,
   },
   {attachTo: {element: '#simulate_radio_true_wrapper_id', on: 'top'},
-   text: `To accomplish these goals,<br/>
-          please select <b>simulate</b> (if it isn't already).
+   text: `Please select <b>simulate</b> (if it isn't already).
           You can select <b>real</b> after this tutorial, to move a real robot.`,
    popperOptions: {modifiers: [{ name: 'offset', options: { offset: [0, 20] } }]},
   },
@@ -158,8 +157,8 @@ dui_tour.addSteps([
    popperOptions: {modifiers: [{ name: 'offset', options: { offset: [0, 0] } }]}
   },
   {attachTo: {element: '#eval_id', on: 'right'},
-   text: `The <b>Eval</b> button runs the selected JavaScript code<br/>
-          in the editor.
+   text: `The <b>Eval</b> button runs the selected JavaScript code
+          in the editor.<br/>
           Click it now to evaluate the selection.<br/>
           In the <b>Output</b> pane you'll see the internal data structure
           that represents the instruction, but this does not cause
@@ -190,7 +189,7 @@ dui_tour.addSteps([
    buttons: [{text: 'Back', action: dui_tour.back},
              {text: 'Next', action: dui_tour.next}]
   },
-  {attachTo: { element: '#js_menubar_id', on: 'left'},
+  {attachTo: { element: '#doc_pane_id', on: 'left'},
    text: `Clicking the <b>Jobs</b> menu, <b>Dexter UI</b> item, automatically scrolls
           the <i>Doc Pane</i> to the section of the <i>User Guide</i>
           that describes the Dexter UI dialog.`