I'm getting this warning
Design mode could not load playerglobal.swc. It may be incompatible with this SDK, or invalid. (DesignAssetLoader.CompleteTimeout)
I installed Flash Builder 4 Beta 2
And added the
Create content using the new APIs available in Flash Player 10.1 using Adobe Flash Builder 4 or Adobe Flex Builder 3. Installation instructions are included within the ZIP file.
How do I eliminate this warning?
If you want to use the new fp 10.1 features I would recommend that you download the latest nightly build of the sdk, this includes features required for 10.1 and also has both both globalplayer swc's. You can then target then player 10.0.0 or 10.1.0 in the project settings.
Also make sure that the flashplayer 10.1 beta is correctly installed.