DatagramSocket on mobile AIR 3.8

I've created a really basic project to test the DatagramSocket in AIR 3.8 & Flash Player 11.8, but the DatagramSocket.isSupported property is coming back as false...even though Adobe says it is supported on Android & iOS.
Another new feature is ServerSocket, when I trace that out it comes back as true. Has anyone had trouble using this?
Capabilities.version = IOS 11,8,800,49
NativeApplication.nativeApplication.runtimeVersion = 3.8.0.440
DatagramSocket.isSupported = false
ServerSocket.isSupported = true

Ok, so I just created a blank ActionScript Mobile project, targeted the AIR 3.8 SDK, made sure my descriptor XML has 3.8 namespace, added "-swf-version=21" into the compiler options, compiled a debug build and traced out a few values.
Capabilities Version IOS 11,8,800,49
Runtime Version 3.8.0.440
DatagramSocket.isSupported false
Here is the SWF dump
Adobe SWF Dump Utility
Version 2.0.0 build 353900
Copyright 2003-2012 Adobe Systems Incorporated. All rights reserved.
<?xml version="1.0" encoding="UTF-8"?>

<swf xmlns="http://macromedia/2003/swfx" version="21" framerate="24.0" size="10000x7500" compressed="false" >

<FileAttributes useDirectBlit="false" useGPU="false" hasMetadata="true" actionScript3="true" suppressCrossDomainCaching="false" swfRelativeUrls="false" useNetwork="true"/>
<Metadata>
<![CDATA[<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'><rdf:Description rdf:about='' xmlns:dc='http://purl.org/dc/elements/1.1'><dc:format>application/x-shockwave-flash</dc:format><dc:title>Adobe ActionScript Application</dc:title><dc:description></dc:description><dc:publisher>unknown</dc:publishe r><dc:creator>unknown</dc:creator><dc:language>EN</dc:language><dc:date>May 18, 2013</dc:date></rdf:Description></rdf:RDF>
]]>
</Metadata>
<EnableDebugger2 password="NO-PASSWORD" reserved="0x1975"/>

<ScriptLimits scriptRecursionLimit="1000" scriptTimeLimit="60"/>
<SetBackgroundColor color="#FFFFFF"/>
<ProductInfo product="FLEX" edition="NONE" version="4.6" build="23201" compileDate="5/18/13 2:34 PM"/>
<FrameLabel label="DatagramSocketTest"/>
<DoABC name="DatagramSocketTest"/>
<SymbolClass>
<Symbol idref="0" className="DatagramSocketTest" />
</SymbolClass>
<ShowFrame/>
</swf>

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