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A "flash"back from the future is displayed on the Adobe Labs website. It reads:

At Adobe MAX 2009, Adobe unveiled the next release of Adobe Flash Player that realizes the promise of a consistent, cross-platform runtime across desktop and mobile devices. Flash Player 10.1 beta 2 was released on December 17, 2010 and is available for download.

To see what's new, visit this page.

So if you want to download this Adobe Flash Player 10.1 beta 2 which apparently is to be released on December 17, 2010 but don't want to wait till then (joking), download Flash Player 10.1 beta 2 from HERE. Of course, this is only available for 32bit, as the 64bit Adobe Flash Plugin is still in Alpha (for Linux I mean).

To install Adobe Flash Player 10.1 Beta 2 in Linux:

1. Go to /usr/lib/adobe-flashplugin/ or /usr/lib/flashplugin-installer (it depends on how you installed Adobe Flash Player) and rename libflashplayer.so to libflashplayer.so.old. Please note that to do this using Nautilus, you must open it as root:

Press Alt + F2 and enter:
gksu nautilus

If you want to do it using a terminal, simply:

-for /usr/lib/adobe-flashplugin/:
sudo mv /usr/lib/adobe-flashplugin/libflashplayer.so /usr/lib/adobe-flashplugin/libflashplayer.so.old
-for /usr/lib/flashplugin-installer:
sudo mv /usr/lib/flashplugin-installer/libflashplayer.so /usr/lib/flashplugin-installer/libflashplayer.so.old

The reason for renaming the old flashplayer to .old is that if the new Flash Player 10.1 beta 2 doesn't work properly, you can always go back to the previous version.

2. Extract the archive and copy the file called libflashplayer.so from the archive you just extracted, to the /usr/lib/adobe-flashplugin or /usr/lib/flashplugin-installer folder.

Terminal alternative:
wget http://download.macromedia.com/pub/labs/flashplayer10/flashplayer10_1_p2_linux_121709.tar.gz
tar -xvf flashplayer10_1_p2_linux_121709.tar.gz && cd install_flash_player_10_linux/

Then, depending on the location of your libflashplayer.so file:

-for /usr/lib/adobe-flashplugin/:
sudo mv libflashplayer.so /usr/lib/adobe-flashplugin
-for /usr/lib/flashplugin-installer:
sudo mv libflashplayer.so /usr/lib/flashplugin-installer

[via reddit]