diff --git a/client/client_recv.js b/client/client_recv.js
index 8f4e672..440f729 100644
--- a/client/client_recv.js
+++ b/client/client_recv.js
@@ -286,7 +286,7 @@ function handle_event(state, context, event, options = {}) {
                 }
             }
 
-            const index_difference = state.events.length - (last_stroke === null ? 0 : last_stroke.index);
+            const index_difference = state.events.length - (last_stroke === null ? -1 : last_stroke.index);
             wasm_ensure_by(state, index_difference, event.coords.length);
            
             const pressures = state.wasm.buffers['pressures'];
diff --git a/client/index.html b/client/index.html
index 7a4b49c..e966fd0 100644
--- a/client/index.html
+++ b/client/index.html
@@ -9,7 +9,7 @@
     <link rel="shortcut icon" href="icons/favicon.svg" id="favicon">
     <link rel="stylesheet" type="text/css" href="default.css">
 
-    <link rel="preload" href="icons/picker.svg" as="image" type="image/svg+xml" />
+    <!--    <link rel="preload" href="icons/picker.svg" as="image" type="image/svg+xml" /> -->
 
     <script type="text/javascript" src="aux.js"></script>
     <script type="text/javascript" src="heapify.js"></script>
diff --git a/client/webgl_shaders.js b/client/webgl_shaders.js
index 69e17b6..0c78cd0 100644
--- a/client/webgl_shaders.js
+++ b/client/webgl_shaders.js
@@ -491,12 +491,12 @@ function init_webgl(state, context) {
     gl.bindTexture(gl.TEXTURE_2D, context.textures['stroke_data']);
     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
-    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA16UI, config.stroke_texture_size, config.stroke_texture_size, 0, gl.RGBA_INTEGER, gl.UNSIGNED_SHORT, null);
+    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA16UI, config.stroke_texture_size, config.stroke_texture_size, 0, gl.RGBA_INTEGER, gl.UNSIGNED_SHORT, new Uint16Array(config.stroke_texture_size * config.stroke_texture_size * 4)); // fill the whole texture once with zeroes to kill a warning about a partial upload
 
     gl.bindTexture(gl.TEXTURE_2D, context.textures['dynamic_stroke_data']);
     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
-    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA16UI, config.dynamic_stroke_texture_size, config.dynamic_stroke_texture_size, 0, gl.RGBA_INTEGER, gl.UNSIGNED_SHORT, null);
+    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA16UI, config.dynamic_stroke_texture_size, config.dynamic_stroke_texture_size, 0, gl.RGBA_INTEGER, gl.UNSIGNED_SHORT, new Uint16Array(config.dynamic_stroke_texture_size * config.dynamic_stroke_texture_size * 4)); // fill the whole texture once with zeroes to kill a warning about a partial upload
 
     const resize_canvas = (entries) => {
         // https://www.khronos.org/webgl/wiki/HandlingHighDPI