diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
index 7a43450108e..9d6773ea9d9 100644
--- a/src/compiler/factory.ts
+++ b/src/compiler/factory.ts
@@ -1677,16 +1677,10 @@ namespace ts {
 
     function createJsxFactoryExpressionFromEntityName(jsxFactory: EntityName, parent: JsxOpeningLikeElement): Expression {
         if (isQualifiedName(jsxFactory)) {
-            return createPropertyAccess(
-                createJsxFactoryExpressionFromEntityName(
-                    jsxFactory.left,
-                    parent
-                ),
-                setEmitFlags(
-                    getMutableClone(jsxFactory.right),
-                    EmitFlags.NoSourceMap
-                )
-            );
+            const left = createJsxFactoryExpressionFromEntityName(jsxFactory.left, parent);
+            const right = <Identifier>createSynthesizedNode(SyntaxKind.Identifier);
+            right.text = jsxFactory.right.text;
+            return createPropertyAccess(left, right);
         }
         else {
             return createReactNamespace(jsxFactory.text, parent);
diff --git a/src/harness/unittests/tsserverProjectSystem.ts b/src/harness/unittests/tsserverProjectSystem.ts
index 43f125b0bed..a0a6ac7f01e 100644
--- a/src/harness/unittests/tsserverProjectSystem.ts
+++ b/src/harness/unittests/tsserverProjectSystem.ts
@@ -578,6 +578,35 @@ namespace ts.projectSystem {
             checkWatchedDirectories(host, ["/a/b/c", "/a/b", "/a"]);
         });
 
+        it("can handle tsconfig file name with difference casing", () => {
+            const f1 = {
+                path: "/a/b/app.ts",
+                content: "let x = 1"
+            };
+            const config = {
+                path: "/a/b/tsconfig.json",
+                content: JSON.stringify({
+                    include: []
+                })
+            };
+
+            const host = createServerHost([f1, config], { useCaseSensitiveFileNames: false });
+            const service = createProjectService(host);
+            service.openExternalProject(<protocol.ExternalProject>{
+                projectFileName: "/a/b/project.csproj",
+                rootFiles: toExternalFiles([f1.path, combinePaths(getDirectoryPath(config.path).toUpperCase(), getBaseFileName(config.path))]),
+                options: {}
+            });
+            service.checkNumberOfProjects({ configuredProjects: 1 });
+            checkProjectActualFiles(service.configuredProjects[0], []);
+
+            service.openClientFile(f1.path);
+            service.checkNumberOfProjects({ configuredProjects: 1, inferredProjects: 1 });
+
+            checkProjectActualFiles(service.configuredProjects[0], []);
+            checkProjectActualFiles(service.inferredProjects[0], [f1.path]);
+        })
+
         it("create configured project without file list", () => {
             const configFile: FileOrFolder = {
                 path: "/a/b/tsconfig.json",
diff --git a/src/lib/es5.d.ts b/src/lib/es5.d.ts
index 7ee47817802..1e6b44788b3 100644
--- a/src/lib/es5.d.ts
+++ b/src/lib/es5.d.ts
@@ -176,6 +176,18 @@ interface ObjectConstructor {
       */
     seal<T>(o: T): T;
 
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T>(a: T[]): ReadonlyArray<T>;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T extends Function>(f: T): T;
+
     /**
       * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
       * @param o Object on which to lock the attributes.
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 83fb4642539..4c7193be921 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -257,7 +257,7 @@ namespace ts.server {
 
         private changedFiles: ScriptInfo[];
 
-        private toCanonicalFileName: (f: string) => string;
+        readonly toCanonicalFileName: (f: string) => string;
 
         public lastDeletedFile: ScriptInfo;
 
@@ -777,7 +777,13 @@ namespace ts.server {
         }
 
         private findConfiguredProjectByProjectName(configFileName: NormalizedPath) {
-            return findProjectByName(configFileName, this.configuredProjects);
+            // make sure that casing of config file name is consistent
+            configFileName = asNormalizedPath(this.toCanonicalFileName(configFileName));
+            for (const proj of this.configuredProjects) {
+                if (proj.canonicalConfigFilePath === configFileName) {
+                    return proj;
+                }
+            }
         }
 
         private findExternalProjectByProjectName(projectFileName: string) {
diff --git a/src/server/project.ts b/src/server/project.ts
index c37dd6e135a..c28b29b944b 100644
--- a/src/server/project.ts
+++ b/src/server/project.ts
@@ -817,6 +817,7 @@ namespace ts.server {
         private directoryWatcher: FileWatcher;
         private directoriesWatchedForWildcards: Map<FileWatcher>;
         private typeRootsWatchers: FileWatcher[];
+        readonly canonicalConfigFilePath: NormalizedPath;
 
         /** Used for configured projects which may have multiple open roots */
         openRefCount = 0;
@@ -830,6 +831,7 @@ namespace ts.server {
             languageServiceEnabled: boolean,
             public compileOnSaveEnabled: boolean) {
             super(configFileName, ProjectKind.Configured, projectService, documentRegistry, hasExplicitListOfFiles, languageServiceEnabled, compilerOptions, compileOnSaveEnabled);
+            this.canonicalConfigFilePath = asNormalizedPath(projectService.toCanonicalFileName(configFileName));
         }
 
         getConfigFilePath() {
diff --git a/tests/baselines/reference/jsxFactoryQualifiedNameWithEs5.js b/tests/baselines/reference/jsxFactoryQualifiedNameWithEs5.js
new file mode 100644
index 00000000000..ecf7d13d89d
--- /dev/null
+++ b/tests/baselines/reference/jsxFactoryQualifiedNameWithEs5.js
@@ -0,0 +1,27 @@
+//// [index.tsx]
+
+import "./jsx";
+
+var skate: any;
+const React = { createElement: skate.h };
+
+class Component {
+    renderCallback() {
+        return <div>test</div>;
+    }
+};
+
+//// [index.js]
+"use strict";
+require("./jsx");
+var skate;
+var React = { createElement: skate.h };
+var Component = (function () {
+    function Component() {
+    }
+    Component.prototype.renderCallback = function () {
+        return skate.h("div", null, "test");
+    };
+    return Component;
+}());
+;
diff --git a/tests/baselines/reference/jsxFactoryQualifiedNameWithEs5.symbols b/tests/baselines/reference/jsxFactoryQualifiedNameWithEs5.symbols
new file mode 100644
index 00000000000..35879c81ca6
--- /dev/null
+++ b/tests/baselines/reference/jsxFactoryQualifiedNameWithEs5.symbols
@@ -0,0 +1,23 @@
+=== tests/cases/compiler/index.tsx ===
+
+import "./jsx";
+
+var skate: any;
+>skate : Symbol(skate, Decl(index.tsx, 3, 3))
+
+const React = { createElement: skate.h };
+>React : Symbol(React, Decl(index.tsx, 4, 5))
+>createElement : Symbol(createElement, Decl(index.tsx, 4, 15))
+>skate : Symbol(skate, Decl(index.tsx, 3, 3))
+
+class Component {
+>Component : Symbol(Component, Decl(index.tsx, 4, 41))
+
+    renderCallback() {
+>renderCallback : Symbol(Component.renderCallback, Decl(index.tsx, 6, 17))
+
+        return <div>test</div>;
+>div : Symbol(unknown)
+>div : Symbol(unknown)
+    }
+};
diff --git a/tests/baselines/reference/jsxFactoryQualifiedNameWithEs5.types b/tests/baselines/reference/jsxFactoryQualifiedNameWithEs5.types
new file mode 100644
index 00000000000..21fd4bae84b
--- /dev/null
+++ b/tests/baselines/reference/jsxFactoryQualifiedNameWithEs5.types
@@ -0,0 +1,27 @@
+=== tests/cases/compiler/index.tsx ===
+
+import "./jsx";
+
+var skate: any;
+>skate : any
+
+const React = { createElement: skate.h };
+>React : { createElement: any; }
+>{ createElement: skate.h } : { createElement: any; }
+>createElement : any
+>skate.h : any
+>skate : any
+>h : any
+
+class Component {
+>Component : Component
+
+    renderCallback() {
+>renderCallback : () => any
+
+        return <div>test</div>;
+><div>test</div> : any
+>div : any
+>div : any
+    }
+};
diff --git a/tests/baselines/reference/objectFreeze.errors.txt b/tests/baselines/reference/objectFreeze.errors.txt
new file mode 100644
index 00000000000..9c28c62f534
--- /dev/null
+++ b/tests/baselines/reference/objectFreeze.errors.txt
@@ -0,0 +1,22 @@
+tests/cases/compiler/objectFreeze.ts(9,1): error TS2542: Index signature in type 'ReadonlyArray<number>' only permits reading.
+tests/cases/compiler/objectFreeze.ts(12,3): error TS2540: Cannot assign to 'b' because it is a constant or a read-only property.
+
+
+==== tests/cases/compiler/objectFreeze.ts (2 errors) ====
+    const f = Object.freeze(function foo(a: number, b: string) { return false; });
+    f(1, "") === false;
+    
+    class C { constructor(a: number) { } }
+    const c = Object.freeze(C);
+    new c(1);
+    
+    const a = Object.freeze([1, 2, 3]);
+    a[0] = a[2].toString();
+    ~~~~
+!!! error TS2542: Index signature in type 'ReadonlyArray<number>' only permits reading.
+    
+    const o = Object.freeze({ a: 1, b: "string" });
+    o.b = o.a.toString();
+      ~
+!!! error TS2540: Cannot assign to 'b' because it is a constant or a read-only property.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/objectFreeze.js b/tests/baselines/reference/objectFreeze.js
new file mode 100644
index 00000000000..4c37631bb10
--- /dev/null
+++ b/tests/baselines/reference/objectFreeze.js
@@ -0,0 +1,29 @@
+//// [objectFreeze.ts]
+const f = Object.freeze(function foo(a: number, b: string) { return false; });
+f(1, "") === false;
+
+class C { constructor(a: number) { } }
+const c = Object.freeze(C);
+new c(1);
+
+const a = Object.freeze([1, 2, 3]);
+a[0] = a[2].toString();
+
+const o = Object.freeze({ a: 1, b: "string" });
+o.b = o.a.toString();
+
+
+//// [objectFreeze.js]
+var f = Object.freeze(function foo(a, b) { return false; });
+f(1, "") === false;
+var C = (function () {
+    function C(a) {
+    }
+    return C;
+}());
+var c = Object.freeze(C);
+new c(1);
+var a = Object.freeze([1, 2, 3]);
+a[0] = a[2].toString();
+var o = Object.freeze({ a: 1, b: "string" });
+o.b = o.a.toString();
diff --git a/tests/cases/compiler/jsxFactoryQualifiedNameWithEs5.ts b/tests/cases/compiler/jsxFactoryQualifiedNameWithEs5.ts
new file mode 100644
index 00000000000..86fd9935a1f
--- /dev/null
+++ b/tests/cases/compiler/jsxFactoryQualifiedNameWithEs5.ts
@@ -0,0 +1,17 @@
+//@module: commonjs
+//@target: es5
+//@jsx: react
+//@jsxFactory: skate.h
+//@noEmit: false
+
+// @filename: index.tsx
+import "./jsx";
+
+var skate: any;
+const React = { createElement: skate.h };
+
+class Component {
+    renderCallback() {
+        return <div>test</div>;
+    }
+};
\ No newline at end of file
diff --git a/tests/cases/compiler/objectFreeze.ts b/tests/cases/compiler/objectFreeze.ts
new file mode 100644
index 00000000000..5e8539831b1
--- /dev/null
+++ b/tests/cases/compiler/objectFreeze.ts
@@ -0,0 +1,12 @@
+const f = Object.freeze(function foo(a: number, b: string) { return false; });
+f(1, "") === false;
+
+class C { constructor(a: number) { } }
+const c = Object.freeze(C);
+new c(1);
+
+const a = Object.freeze([1, 2, 3]);
+a[0] = a[2].toString();
+
+const o = Object.freeze({ a: 1, b: "string" });
+o.b = o.a.toString();