Flex Chrome now showing up on AIR app when I compile with Flex 4 SDK

I have an AIR app initially written in Flex 3 that I had removed the Chrome from, but now it shows up when I compile using Flash Builder 4 with Flex 4 SDK. I have

<systemChrome>none</systemChrome> 
<transparent>true</transparent> 

set in the *-app.xml file and showFlexChrome="false" showStatusBar="false" showTitleBar="false" set in the tag开发者_Python百科. The status bar is gone, but I still see the title bar appear. Any advice would be greatly appreciated. Thanks in advance.

I just downloaded the Flex 4 SDK and converted an old Flex 3 app over and I also got some odd behaviour on my new spark WindowedApplication. I'm using command line builds (can't afford FlashBuilder) but it should all be the same.

My application was totally missing its TitleBar, however its StatusBar was visible (although without the resize grip). I had similar *-app.xml entries to you, but nothing else mentioning the TitleBar in my code.

After playing around a bit I realised it was the style code in the application's mxml. It used to look like this in Flex 3...

<mx:Style>
    WindowedApplication
    {
        background-color:"0x999999";
        background-alpha:"0.8";
    }
</mx:Style>

...which got changed to this to compile in Flex 4...

<fx:Style>
    @namespace "library://ns.adobe.com/flex/spark";
    WindowedApplication
    {
        background-color:#999999;
        background-alpha:0.8;
    }
</fx:Style>

...but I found to fix my main application window, I needed to change it to...

<fx:Style>
    @namespace "library://ns.adobe.com/flex/spark";
    WindowedApplication
    {
        skinClass:ClassReference("spark.skins.spark.SparkChromeWindowedApplicationSkin");
    }
</fx:Style>

And now I have a great looking app window with a TitleBar and a StatusBar (with a resize grip as well!). Hope this helps.

Cheers Drew