# rpm -e flash-plugin
Welcome to the Adobe Flex 4.5.1 SDK release.
Flex SDK includes the Flex framework (also known as the Flex class library), Flex command-line compilers, the Flex debugger, the ASDoc utility, and the debugger version of Adobe® Flash® Player and Adobe® AIR® runtimes. Use the Flex SDK to develop, compile, and deploy Flex applications that connect to XML and SOAP web services or connect to various server technologies such as PHP, Adobe® ColdFusion®, Java, and .NET using a server technology such as BlazeDS. Flex applications can be built and configured to target browsers via the Flash Player runtime and desktops or mobile devices via the AIR runtime.
This Flex 4.5.1 SDK build is 188.8.131.5228 and contains:
We strongly suggest you DO NOT overlay different AIR, AIR SDK or Flash Player versions into Flex 4.5.1 SDK build 184.108.40.20628. Development, debugging and deployment workflows are only certified with the AIR and Flash Player versions installed with the Flex SDK.
The Flex SDK installation is delivered as a ZIP file and contains the Flex framework, Adobe AIR framework, and command-line tools, such as the mxmlc command-line utility, Adobe AIR command-line utility, the ASDoc utility, the Flex command-line debugger, and the debugger version of Flash Player.
You should use Flex SDK with the latest version of the debug Flash Player 10. Prior to installing the Flex SDK, you should uninstall your current Flash Player.
Manual removal (for users who installed the plug-in via Install script):
Create a directory to contain Flex SDK.
Extract the Flex SDK ZIP file to this directory. The Flex SDK contains the following directories:
Ensure that the Java Runtime Environment (JRE) is installed on the computer and that the java_home/bin directory is defined in the system path. JRE 1.5,or 1.6 is required.
Install the appropriate debug Flash Player from the install_root/runtimes/player/platform directory.
(Optional) When the Flash Player installation finishes, restart your computer to ensure that the updated Flash Player browser plug-in is enabled.
There have been some changes made in Flex 4.5 SDK that alter certain behaviors compared to Flex 4. To get the full list of issues, please refer to the Flex Backwards Compatibility document. In most cases, you can maintain Flex 4 (or even Flex 3) behavior by using the compiler argument, -compatibility-version.
As of Flex 4, the data visualization components are part of the full SDK distribution.
As of Flex 4, automated testing support is part of the full SDK distribution.
This section contains selected known issues and notable changes since the previous release. For a complete list of Flex issues and their status, see the public bugbase. The public bugbase lets you search for known issues, comment on them and add new bugs.
Tip: Use Filters to customize your search.
Text with Flex Mobile projects targeting Apple iOS
Editable text components should not be placed inside a Scroller. Focused text controls will not be clipped, which can cause the text to be overlayed on top of the ActionBar or TabBar. We recommend keeping editable text components on the top half of the screen or pushing a new screen for editing each individual item. Please see this tech note for more information.
Packaging applications for Apple iOS with Flex 4.5.1
Flex applications do not perform well on iOS when developed and packaged with Flex SDK 4.5.1 command-line tools. We recommend packaging applications for iOS using the AIR 2.7 command line packager (adt) - please see this tech note for more information.
SDK-30625 - RTE when re-orienting while SplashScreen is up
For a Flex Mobile project running in debug mode, the Application may throw a benign null-pointer RTE during a portion of the start-up application sequence if device orientation changes at that time. The RTE will bring up the standard Flash "uncaught exception" dialog if the application is running in ADL. The RTE may be noticed if running a debug session of the application either in ADL or on device. If encountered while debugging, the work around is to continue with the debugging session/dismiss the RTE. The RTE doesn't have an effect on the application and no work around is needed for release builds.
SDK-30277 - Xoom device briefly reorients itself to landscape during launch if an AIR application is launched in portrait orientation
Applications with autoOrients set to true that are launched on a Motorola XOOM, where the physical device orientation is portrait, may result in the application reorienting to landscape and back to portrait at launch.
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Adobe, AIR, Flash Builder, Flex and LiveCycle are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and/or other countries.
iPhone and iOS are trademarks of Apple Inc., registered in the U.S. and other countries.