diff --git a/packages/babel-runtime/package.json b/packages/babel-runtime/package.json
index 1a03de7721..1e45e811e5 100644
--- a/packages/babel-runtime/package.json
+++ b/packages/babel-runtime/package.json
@@ -6,10 +6,10 @@
   "repository": "babel/babel",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "dependencies": {
-    "core-js": "^0.9.0"
+    "core-js": "^1.0.0"
   },
   "devDependencies": {
     "babel-plugin-runtime": "^1.0.7",
     "regenerator": "^0.8.34"
   }
-}
\ No newline at end of file
+}
diff --git a/packages/babel/package.json b/packages/babel/package.json
index 58b810865f..97497c1dec 100644
--- a/packages/babel/package.json
+++ b/packages/babel/package.json
@@ -46,7 +46,7 @@
     "bluebird": "^2.9.33",
     "chalk": "^1.0.0",
     "convert-source-map": "^1.1.0",
-    "core-js": "^0.9.0",
+    "core-js": "^1.0.0",
     "debug": "^2.1.1",
     "detect-indent": "^3.0.0",
     "esutils": "^2.0.0",
@@ -62,7 +62,7 @@
     "path-exists": "^1.0.0",
     "path-is-absolute": "^1.0.0",
     "private": "^0.1.6",
-    "regenerator": "0.8.34",
+    "regenerator": "0.8.35",
     "regexpu": "^1.1.2",
     "repeating": "^1.1.2",
     "resolve": "^1.1.6",
@@ -75,4 +75,4 @@
     "trim-right": "^1.0.0",
     "try-resolve": "^1.0.0"
   }
-}
\ No newline at end of file
+}
diff --git a/packages/babel/scripts/build-dist.sh b/packages/babel/scripts/build-dist.sh
index a2c7845393..3993f3235f 100755
--- a/packages/babel/scripts/build-dist.sh
+++ b/packages/babel/scripts/build-dist.sh
@@ -12,8 +12,11 @@ node scripts/cache-templates
 node $BROWSERIFY_CMD -e lib/polyfill.js >dist/polyfill.js
 node $UGLIFY_CMD dist/polyfill.js >dist/polyfill.min.js
 
-node $BROWSERIFY_CMD lib/api/browser.js -s babel $BROWSERIFY_IGNORE >dist/browser.js
-node $UGLIFY_CMD dist/browser.js >dist/browser.min.js
+# Add a Unicode BOM so browsers will interpret the file as UTF-8
+printf '\xEF\xBB\xBF' > dist/browser.js
+node $BROWSERIFY_CMD lib/api/browser.js -s babel $BROWSERIFY_IGNORE >>dist/browser.js
+printf '\xEF\xBB\xBF' > dist/browser.min.js
+node $UGLIFY_CMD dist/browser.js >>dist/browser.min.js
 
 node $BROWSERIFY_CMD lib/api/node.js --node $BROWSERIFY_IGNORE >dist/node.js
 
diff --git a/packages/babel/src/transformation/transformers/internal/block-hoist.js b/packages/babel/src/transformation/transformers/internal/block-hoist.js
index ef611fe7fd..5cee32309e 100644
--- a/packages/babel/src/transformation/transformers/internal/block-hoist.js
+++ b/packages/babel/src/transformation/transformers/internal/block-hoist.js
@@ -26,7 +26,10 @@ export var visitor = {
       var hasChange = false;
       for (var i = 0; i < node.body.length; i++) {
         var bodyNode = node.body[i];
-        if (bodyNode && bodyNode._blockHoist != null) hasChange = true;
+        if (bodyNode && bodyNode._blockHoist != null) {
+          hasChange = true;
+          break;
+        }
       }
       if (!hasChange) return;
 
diff --git a/packages/babel/src/traversal/path/introspection.js b/packages/babel/src/traversal/path/introspection.js
index 804e06d9d1..0adafb130b 100644
--- a/packages/babel/src/traversal/path/introspection.js
+++ b/packages/babel/src/traversal/path/introspection.js
@@ -171,27 +171,26 @@ export function referencesImport(moduleSource, importName) {
   if (!binding || binding.kind !== "module") return false;
 
   var path = binding.path;
-  if (!path.isImportDeclaration()) return false;
+  var parent = path.parentPath;
+  if (!parent.isImportDeclaration()) return false;
 
   // check moduleSource
-  if (path.node.source.value === moduleSource) {
+  if (parent.node.source.value === moduleSource) {
     if (!importName) return true;
   } else {
     return false;
   }
 
-  for (var specifier of (path.node.specifiers: Array)) {
-    if (t.isSpecifierDefault(specifier) && importName === "default") {
-      return true;
-    }
+  if (path.isImportDefaultSpecifier() && importName === "default") {
+    return true;
+  }
 
-    if (t.isImportNamespaceSpecifier(specifier) && importName === "*") {
-      return true;
-    }
+  if (path.isImportNamespaceSpecifier() && importName === "*") {
+    return true;
+  }
 
-    if (t.isImportSpecifier(specifier) && specifier.imported.name === importName) {
-      return true;
-    }
+  if (path.isImportSpecifier() && path.node.imported.name === importName) {
+    return true;
   }
 
   return false;
diff --git a/packages/babel/src/traversal/scope/index.js b/packages/babel/src/traversal/scope/index.js
index 2c91c5ed14..884bbde849 100644
--- a/packages/babel/src/traversal/scope/index.js
+++ b/packages/babel/src/traversal/scope/index.js
@@ -537,8 +537,13 @@ export default class Scope {
       }
     } else if (path.isClassDeclaration()) {
       this.registerBinding("let", path);
-    } else if (path.isImportDeclaration() || path.isExportDeclaration()) {
-      this.registerBinding("module", path);
+    } else if (path.isImportDeclaration()) {
+      var specifiers = path.get("specifiers");
+      for (var specifier of (specifiers: Array)) {
+        this.registerBinding("module", specifier);
+      }
+    } else if (path.isExportDeclaration()) {
+      this.registerBinding("module", path.get("declaration"));
     } else {
       this.registerBinding("unknown", path);
     }