diff --git a/res/raw/mime_types.properties b/res/raw/mime_types.properties
index a9a8229f4..db2d295e3 100644
--- a/res/raw/mime_types.properties
+++ b/res/raw/mime_types.properties
@@ -18,7 +18,7 @@
 # Mime type list
 #
 # Format:
-#    <extension> = <category> | <mime type> | <drawable>
+#    (extension) = (category) | (mime type) | (drawable)
 #
 
 # Binary
diff --git a/src/com/cyanogenmod/filemanager/commands/shell/UncompressCommand.java b/src/com/cyanogenmod/filemanager/commands/shell/UncompressCommand.java
index a4d277f9a..0bade8aca 100644
--- a/src/com/cyanogenmod/filemanager/commands/shell/UncompressCommand.java
+++ b/src/com/cyanogenmod/filemanager/commands/shell/UncompressCommand.java
@@ -342,7 +342,7 @@ private static Mode getMode(String src) {
         int cc = modes.length;
         for (int i = 0; i < cc; i++) {
             Mode mode = modes[i];
-            if (mode.mMode.mExtension.compareTo(extension) == 0) {
+            if (mode.mMode.mExtension.compareToIgnoreCase(extension) == 0) {
                 return mode;
             }
         }
diff --git a/src/com/cyanogenmod/filemanager/ui/policy/CompressActionPolicy.java b/src/com/cyanogenmod/filemanager/ui/policy/CompressActionPolicy.java
index 6c98f02d8..bdefe1986 100644
--- a/src/com/cyanogenmod/filemanager/ui/policy/CompressActionPolicy.java
+++ b/src/com/cyanogenmod/filemanager/ui/policy/CompressActionPolicy.java
@@ -743,7 +743,7 @@ static void checkZipSecurityWarning(
         // the system and is need a security alert that the user can confirm prior to
         // make the extraction
         String ext = FileHelper.getExtension(fso);
-        if (ConsoleBuilder.isPrivileged() && ext.compareTo("zip") == 0) { //$NON-NLS-1$
+        if (ConsoleBuilder.isPrivileged() && ext.compareToIgnoreCase("zip") == 0) { //$NON-NLS-1$
             AlertDialog dialog = DialogHelper.createYesNoDialog(
                 ctx,
                 R.string.confirm_overwrite,
diff --git a/src/com/cyanogenmod/filemanager/util/FileHelper.java b/src/com/cyanogenmod/filemanager/util/FileHelper.java
index f4f3612eb..abf4fed04 100644
--- a/src/com/cyanogenmod/filemanager/util/FileHelper.java
+++ b/src/com/cyanogenmod/filemanager/util/FileHelper.java
@@ -827,7 +827,7 @@ public static boolean isSupportedUncompressedFile(FileSystemObject fso) {
         if (ext != null) {
             int cc = VALID.length;
             for (int i = 0; i < cc; i++) {
-                if (VALID[i].compareTo(ext) == 0) {
+                if (VALID[i].compareToIgnoreCase(ext) == 0) {
                     return true;
                 }
             }
diff --git a/src/com/cyanogenmod/filemanager/util/MimeTypeHelper.java b/src/com/cyanogenmod/filemanager/util/MimeTypeHelper.java
index 3c7385dc5..b87110ddd 100644
--- a/src/com/cyanogenmod/filemanager/util/MimeTypeHelper.java
+++ b/src/com/cyanogenmod/filemanager/util/MimeTypeHelper.java
@@ -213,7 +213,7 @@ public static final String getIcon(Context context, FileSystemObject fso) {
         //Get the extension and delivery
         String ext = FileHelper.getExtension(fso);
         if (ext != null) {
-            MimeTypeInfo mimeTypeInfo = sMimeTypes.get(ext);
+            MimeTypeInfo mimeTypeInfo = sMimeTypes.get(ext.toLowerCase());
             if (mimeTypeInfo != null) {
                 // Create a new drawable
                 if (!TextUtils.isEmpty(mimeTypeInfo.mDrawable)) {
@@ -263,7 +263,7 @@ public static final String getMimeType(Context context, FileSystemObject fso) {
         String ext = FileHelper.getExtension(fso);
         if (ext != null) {
             //Load from the database of mime types
-            MimeTypeInfo mimeTypeInfo = sMimeTypes.get(ext);
+            MimeTypeInfo mimeTypeInfo = sMimeTypes.get(ext.toLowerCase());
             if (mimeTypeInfo != null) {
                 return mimeTypeInfo.mMimeType;
             }
@@ -312,7 +312,7 @@ public static final String getMimeTypeDescription(Context context, FileSystemObj
         String ext = FileHelper.getExtension(fso);
         if (ext != null) {
             //Load from the database of mime types
-            MimeTypeInfo mimeTypeInfo = sMimeTypes.get(ext);
+            MimeTypeInfo mimeTypeInfo = sMimeTypes.get(ext.toLowerCase());
             if (mimeTypeInfo != null) {
                 return mimeTypeInfo.mMimeType;
             }
@@ -347,7 +347,7 @@ public static final MimeTypeCategory getCategory(Context context, File file) {
         String ext = FileHelper.getExtension(file.getName());
         if (ext != null) {
             //Load from the database of mime types
-            MimeTypeInfo mimeTypeInfo = sMimeTypes.get(ext);
+            MimeTypeInfo mimeTypeInfo = sMimeTypes.get(ext.toLowerCase());
             if (mimeTypeInfo != null) {
                 return mimeTypeInfo.mCategory;
             }
@@ -387,7 +387,7 @@ public static final MimeTypeCategory getCategory(Context context, FileSystemObje
         String ext = FileHelper.getExtension(fso);
         if (ext != null) {
             //Load from the database of mime types
-            MimeTypeInfo mimeTypeInfo = sMimeTypes.get(ext);
+            MimeTypeInfo mimeTypeInfo = sMimeTypes.get(ext.toLowerCase());
             if (mimeTypeInfo != null) {
                 return mimeTypeInfo.mCategory;
             }