[OUTDATED]Youtube Homepage Swap for Greasemonkey

Script Summary: [OUTDATED]Allows you to switch the look of the homepage. **BROKEN AS OF DECEMBER 7, 2012 UPDATE TO YOUTUBE

Version: 1.2.4

Allows you to switch between the look of the current youtube homepage and the one that youtube is going to release in the future.

The script will add a Swap Homepage button to the top right corner of Youtube. See the Screenshots section for more details.
If this script is not working for you, try changing your language settings at the bottom of Youtube's homepage! So far, English (US) is confirmed to work with this script.

Special thanks to kuzu for helping me get this script working!

Compatibility

This script currently comfirmed by me to work for:

Firefox with Greasemonkey
Chrome (with or without tampermonkey)

However, I have not tested all browsers and yours could be compatible.

Screenshots

This is the current layout. The script adds the button you see in the top right corner.

(Click for larger image)

This is the same script active on Youtube's soon-to-be homepage.

(Click for larger image)

Changelog

What's different in version 1.2.4?

Fixed various bugs including the button not showing up when users had a specific cookie to a 'newer' page. Another fix is the problem with some Google+ accounts not being able to see the button. Enjoy!

What's different in version 1.2.2?

Thanks to mustangfan1995, the script works once again. I don't know how long this can keep up of the script breaking and working again...

What's different in version 1.2?

Thanks to Vivre, the script has the latest cookie for the Pre-Homepage. Another shout-out goes to rctgamer3 for helping with multiple bugs!

What's different in version 1.1.7?

Thanks to mustangfan1995 and Vivre, the script is now working again!

What's different in version 1.1.6?

This script no longer runs on Youtube's watch page

What's different in version 1.1.5?

I removed the @run-at in version 1.1.4 in order to speed up the load time of the script, but it makes the script less likely to actually load the proper cookie.

What's different in version 1.1.4?

Fixed script to not run on iFrames.

What's different in version 1.1.3?

Moved the buttons location in order to fix the button overlapping other content.

What's different in version 1.1.2?

Fixed the scripts compatibility with other browsers! Also updated the button to look nicer!

What's different in version 1.1.1?

Fixed a small bug that made the script activate on pages that it was not supposed to.

What's different in version 1.1?

I was looking at the new deadpool video game's site here and noticed that when i clicked the video it would bring up an iframe for youtube to embed the video. That activated my script. It is fixed to no longer activate on iFrames... at least for youtube.com/embed