diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 21f0014..81bb0b0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -17,6 +17,7 @@
 0. If you add new functions, **add documentation** (comment above)
   * Wrap function arguments in `+` signs (e.g. `the +type+ is used for…`)
 0. If you add new functions, **add tests** (test/test.js)
+0. If you fixed an issue, **add a test** that would catch this issue
 0. Run **tests** (`npm test`)
 0. Make sure as much of your code as possible is **covered by tests**
 0. Double check that your pull request is **awesome** :)
\ No newline at end of file
diff --git a/bin/www.js b/bin/www.js
index 323b4ef..ffefdf9 100644
--- a/bin/www.js
+++ b/bin/www.js
@@ -10,8 +10,8 @@ if (cluster.isMaster) {
     cluster.fork();
   }
 
-  cluster.on("exit", function (worker, code, signal) {
-    logging.error("Worker died. Rebooting a new one.");
+  cluster.on("exit", function (worker) {
+    logging.error("Worker #" + worker.id + " died. Rebooting a new one.");
     setTimeout(cluster.fork, 100);
   });
 
diff --git a/modules/helpers.js b/modules/helpers.js
index f9a9028..dc6a82b 100644
--- a/modules/helpers.js
+++ b/modules/helpers.js
@@ -146,7 +146,15 @@ function store_images(rid, userId, details, type, callback) {
     currently_running.push(new_hash);
     networking.get_profile(rid, (is_uuid ? userId : null), function(err, profile) {
       if (err || (is_uuid && !profile)) {
-        callback_for(userId, type, err, null);
+        if (!err && !profile) {
+          cache.save_hash(rid, userId, null, null, function(cache_err) {
+            // we have no profile, so we have neither skin nor cape
+            callback_for(userId, "skin", cache_err, null);
+            callback_for(userId, "cape", cache_err, null);
+          });
+        } else {
+          callback_for(userId, type, err, null);
+        }
       } else {
         store_skin(rid, userId, profile, details, function(err, skin_hash) {
           cache.save_hash(rid, userId, skin_hash, null, function(cache_err) {
diff --git a/modules/renders.js b/modules/renders.js
index 4f1776e..c5ca3c4 100644
--- a/modules/renders.js
+++ b/modules/renders.js
@@ -2,7 +2,6 @@
 // https://github.com/confuser/serverless-mc-skin-viewer
 // Permission to use & distribute https://github.com/confuser/serverless-mc-skin-viewer/blob/master/LICENSE
 
-var helpers = require("./helpers");
 var logging = require("./logging");
 var fs = require("fs");
 var Canvas = require("canvas");
@@ -43,7 +42,7 @@ exp.draw_head = function(skin_canvas, model_ctx, scale) {
 // using the skin from the +model_ctx+ at the +scale+
 // parts are labeled as if drawn from the skin's POV
 exp.draw_body = function(rid, skin_canvas, model_ctx, scale) {
-  if (skin_canvas.height == 32 * scale) {
+  if (skin_canvas.height === 32 * scale) {
     logging.debug(rid + "uses old skin format");
     //Left Leg
     //Left Leg - Front
@@ -189,8 +188,8 @@ function scale_image(imageData, context, d_x, d_y, scale) {
   var width = imageData.width;
   var height = imageData.height;
   context.clearRect(0,0,width,height); //Clear the spot where it originated from
-  for(y=0; y<height; y++) { //height original
-    for(x=0; x<width; x++) { //width original
+  for(var y = 0; y < height; y++) { // height original
+    for(var x = 0; x < width; x++) { // width original
       //Gets original colour, then makes a scaled square of the same colour
       var index = (x + y * width) * 4;
       context.fillStyle = "rgba(" + imageData.data[index+0] + "," + imageData.data[index+1] + "," + imageData.data[index+2] + "," + imageData.data[index+3] + ")";
diff --git a/package.json b/package.json
index 27cd8a1..505aa48 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "test": "istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage"
   },
   "engines": {
-    "node": "0.12.x"
+    "iojs": "1.2.x"
   },
   "dependencies": {
     "canvas": "crafatar/node-canvas",
diff --git a/routes/capes.js b/routes/capes.js
index ae97911..604fe43 100644
--- a/routes/capes.js
+++ b/routes/capes.js
@@ -1,6 +1,7 @@
 var logging = require("../modules/logging");
 var helpers = require("../modules/helpers");
 var config = require("../modules/config");
+var cache = require("../modules/cache");
 
 var human_status = {
   0: "none",
@@ -35,7 +36,7 @@ module.exports = function(req, res) {
       logging.log(rid + "storage type: " + human_status[status]);
       if (err) {
         logging.error(rid + err);
-        if (err.code == "ENOENT") {
+        if (err.code === "ENOENT") {
           // no such file
           cache.remove_hash(rid, userId);
         }
diff --git a/routes/renders.js b/routes/renders.js
index 930758c..b310f17 100644
--- a/routes/renders.js
+++ b/routes/renders.js
@@ -1,6 +1,7 @@
 var logging = require("../modules/logging");
 var helpers = require("../modules/helpers");
 var config = require("../modules/config");
+var cache = require("../modules/cache");
 var skins = require("../modules/skins");
 var renders = require("../modules/renders");
 var fs = require("fs");
@@ -65,7 +66,7 @@ module.exports = function(req, res) {
       logging.log(rid + "storage type: " + human_status[status]);
       if (err) {
         logging.error(rid + err);
-        if (err.code == "ENOENT") {
+        if (err.code === "ENOENT") {
           // no such file
           cache.remove_hash(rid, userId);
         }
diff --git a/server.js b/server.js
index 1209696..2313823 100644
--- a/server.js
+++ b/server.js
@@ -2,7 +2,6 @@
 var logging = require("./modules/logging");
 var querystring = require("querystring");
 var config = require("./modules/config");
-var clean = require("./modules/cleaner");
 var http = require("http");
 var mime = require("mime");
 var url = require("url");