diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0df0c7a8..a974e6476 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,10 @@ IMPROVEMENTS:
 * builder/amazon/all: Can now specify a list of multiple security group
   IDs to apply. [GH-499]
 
+BUG FIXES:
+
+* builder/vmware: VMX modifications are now case-insensitive. [GH-608]
+
 ## 0.3.11 (November 4, 2013)
 
 FEATURES:
diff --git a/builder/vmware/ssh.go b/builder/vmware/ssh.go
index 121d79709..0b499db29 100644
--- a/builder/vmware/ssh.go
+++ b/builder/vmware/ssh.go
@@ -33,7 +33,7 @@ func sshAddress(state multistep.StateBag) (string, error) {
 	var ok bool
 	macAddress := ""
 	if macAddress, ok = vmxData["ethernet0.address"]; !ok || macAddress == "" {
-		if macAddress, ok = vmxData["ethernet0.generatedAddress"]; !ok || macAddress == "" {
+		if macAddress, ok = vmxData["ethernet0.generatedaddress"]; !ok || macAddress == "" {
 			return "", errors.New("couldn't find MAC address in VMX")
 		}
 	}
diff --git a/builder/vmware/step_clean_vmx.go b/builder/vmware/step_clean_vmx.go
index 669d3b2bb..c8a66c5e0 100644
--- a/builder/vmware/step_clean_vmx.go
+++ b/builder/vmware/step_clean_vmx.go
@@ -60,7 +60,7 @@ func (s stepCleanVMX) Run(state multistep.StateBag) multistep.StepAction {
 			if filename == isoPath {
 				// Change the CD-ROM device back to auto-detect to eject
 				vmxData[filenameKey] = "auto detect"
-				vmxData[match+".deviceType"] = "cdrom-raw"
+				vmxData[match+".devicetype"] = "cdrom-raw"
 			}
 		}
 	}
diff --git a/builder/vmware/step_create_vmx.go b/builder/vmware/step_create_vmx.go
index bfff50b6e..6039b3dfc 100644
--- a/builder/vmware/step_create_vmx.go
+++ b/builder/vmware/step_create_vmx.go
@@ -8,6 +8,7 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+	"strings"
 )
 
 type vmxTemplateData struct {
@@ -79,6 +80,7 @@ func (s *stepCreateVMX) Run(state multistep.StateBag) multistep.StepAction {
 		log.Println("Setting custom VMX data...")
 		for k, v := range config.VMXData {
 			log.Printf("Setting VMX: '%s' = '%s'", k, v)
+			k = strings.ToLower(k)
 			vmxData[k] = v
 		}
 	}
@@ -86,12 +88,12 @@ func (s *stepCreateVMX) Run(state multistep.StateBag) multistep.StepAction {
 	if floppyPathRaw, ok := state.GetOk("floppy_path"); ok {
 		log.Println("Floppy path present, setting in VMX")
 		vmxData["floppy0.present"] = "TRUE"
-		vmxData["floppy0.fileType"] = "file"
-		vmxData["floppy0.fileName"] = floppyPathRaw.(string)
+		vmxData["floppy0.filetype"] = "file"
+		vmxData["floppy0.filename"] = floppyPathRaw.(string)
 	}
 
 	// Set this so that no dialogs ever appear from Packer.
-	vmxData["msg.autoAnswer"] = "true"
+	vmxData["msg.autoanswer"] = "true"
 
 	vmxDir := config.OutputDir
 	if config.RemoteType != "" {
diff --git a/builder/vmware/vmx.go b/builder/vmware/vmx.go
index ffd5ac07a..ff60d5477 100644
--- a/builder/vmware/vmx.go
+++ b/builder/vmware/vmx.go
@@ -24,7 +24,8 @@ func ParseVMX(contents string) map[string]string {
 			continue
 		}
 
-		results[matches[1]] = matches[2]
+		key := strings.ToLower(matches[1])
+		results[key] = matches[2]
 	}
 
 	return results