1- Type chrome://plugins into the address bar

2- Click the button on the right side to expand the plugins.

3- Look for the PPAPI PepperFlash plugin.

4- Click Disable

If you already have the official Adobe version of Flash installed, it should show up right under the pepperflash plugin listing

5- Leave this one enabled. Otherwise go download the official one from adobe (http://get.adobe.com/flashplayer/)

6- Clear the cache. Restart chrome.

Note: Pepperflash re-enables itself after Chrome updates so look out for that. Seems that this bug is fixed in the Chrome dev builds, so it might be fixed in an update sooner or later.

Source: http://www.neogaf.com/forum/showthread.php?t=502191