diff --git a/CHANGES.md b/CHANGES.md
index 5c8eaf14..d2b72a6e 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,13 @@
+### 3.7.5
+
+* Improve unhandled rejection formatting in ie8
+
+### 3.7.4
+
+* Add `when/keys settle`, for settling a hash of promises.
+* Use `poly` from npm instead of a git link in package.json. No need for git to be available to npm install when.
+* Various community-contributed documentation updates. Thanks!
+
 ### 3.7.3
 
 * Fix console.log check when using `monitor/console` in IE8.
diff --git a/es6-shim/Promise.js b/es6-shim/Promise.js
index e97f1aa6..5770829a 100644
--- a/es6-shim/Promise.js
+++ b/es6-shim/Promise.js
@@ -299,7 +299,7 @@ define(function() {
 	 * @returns {String} formatted string, suitable for output to developers
 	 */
 	function formatError(e) {
-		var s = typeof e === 'object' && e !== null && e.stack ? e.stack : formatObject(e);
+		var s = typeof e === 'object' && e !== null && (e.stack || e.message) ? e.stack || e.message : formatObject(e);
 		return e instanceof Error ? s : s + ' (WARNING: non-Error used)';
 	}
 
diff --git a/package.json b/package.json
index 901f02e1..e4bec531 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "when",
-  "version": "3.7.4",
+  "version": "3.7.5",
   "description": "A lightweight Promises/A+ and when() implementation, plus other async goodies.",
   "keywords": [
     "cujo",
@@ -84,6 +84,8 @@
     "tunnel": "node test/sauce.js -m",
     "start": "buster-static -e browser",
     "benchmark": "node benchmark/promise && node benchmark/map",
+    "prepublish": "npm run browserify-es6",
+    "preversion": "npm run browserify-es6",
     "browserify-es6": "browserify -s Promise es6-shim/Promise.browserify-es6.js --no-detect-globals -o es6-shim/Promise.js",
     "browserify": "browserify -s when build/when.browserify.js --no-detect-globals -o build/when.js",
     "browserify-debug": "browserify -s when build/when.browserify-debug.js --no-detect-globals -o build/when.js"