diff --git a/src/MacVim/MMAtsuiTextView.m b/src/MacVim/MMAtsuiTextView.m
index 4a6fb1ceca..29504dd2b3 100644
--- a/src/MacVim/MMAtsuiTextView.m
+++ b/src/MacVim/MMAtsuiTextView.m
@@ -892,10 +892,19 @@ defaultLineHeightForFont(NSFont *font)
     return NSNotFound;
 }
 
+// The return type of this message changed with OS X 10.5 so we need this
+// kludge in order to avoid compiler warnings on OS X 10.4.
+#if (MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_4)
 - (NSInteger)conversationIdentifier
 {
     return (NSInteger)self;
 }
+#else
+- (long)conversationIdentifier
+{
+    return (long)self;
+}
+#endif
 
 - (NSRange)selectedRange
 {
diff --git a/src/MacVim/MMPreferenceController.m b/src/MacVim/MMPreferenceController.m
index f1d420ab0f..bfba36f8ac 100644
--- a/src/MacVim/MMPreferenceController.m
+++ b/src/MacVim/MMPreferenceController.m
@@ -40,9 +40,12 @@ static void loadSymbols()
 }
 
 
-static CFStringRef ODBEDITOR = CFSTR("org.slashpunt.edit_in_odbeditor");
-static CFStringRef ODB_BUNDLE_IDENTIFIER = CFSTR("ODBEditorBundleIdentifier");
-static CFStringRef ODB_EDITOR_NAME = CFSTR("ODBEditorName");
+// The compiler on OS X 10.4 balks at using CFSTR() for globals so we get
+// around with this some ugly type casting.
+static CFStringRef ODBEDITOR = (CFStringRef)@"org.slashpunt.edit_in_odbeditor";
+static CFStringRef ODB_BUNDLE_IDENTIFIER =
+                                    (CFStringRef)@"ODBEditorBundleIdentifier";
+static CFStringRef ODB_EDITOR_NAME = (CFStringRef)@"ODBEditorName";
 static NSString *ODBEDITOR_DIR = 
     @"/Library/InputManagers/Edit in ODBEditor";
 static NSString *ODBEDITOR_PATH =