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@@ -3,7 +3,7 @@ This is the open source version of Scratch 2.0 and the core code for the officia
 
 If you're interested in contributing to Scratch, please take a look at the issues on this repository. Two great ways of helping Scratch are by identifying bugs and documenting them as issues, or fixing issues and creating pull requests. When submitting pull requests please be patient -- the Scratch Team is very busy and it can take a while to find time to review them. The organization and class structures can't be radically changed without significant coordination and collaboration from the Scratch Team, so these types of changes should be avoided.
 
-It's been said that the Scratch Team spends about one hour of design discussion for every pixel in Scratch, but some think that estimate is a little low. While we welcome suggestions for new features in our <a href="http://scratch.mit.edu/discuss/1/">suggestions forum</a> (especially ones that come with mockups), we are unlikely to accept PRs with new features that we haven't deeply thought through. Why? Because we have a strong belief in the value of keeping things simple for new users. To learn more about our design philosophy, see this <a href="http://scratch.mit.edu/discuss/1/">forum post<a>, or <a href="http://web.media.mit.edu/~jmaloney/papers/ScratchLangAndEnvironment.pdf">this paper</a>.
+It's been said that the Scratch Team spends about one hour of design discussion for every pixel in Scratch, but some think that estimate is a little low. While we welcome suggestions for new features in our <a href="http://scratch.mit.edu/discuss/1/">suggestions forum</a> (especially ones that come with mockups), we are unlikely to accept PRs with new features that we haven't deeply thought through. Why? Because we have a strong belief in the value of keeping things simple for new users. To learn more about our design philosophy, see this <a href="http://scratch.mit.edu/discuss/post/1576/">forum post<a>, or <a href="http://web.media.mit.edu/~jmaloney/papers/ScratchLangAndEnvironment.pdf">this paper</a>.
 
 ### Building
 To build the Scratch 2.0 SWF you will need [Ant](http://ant.apache.org/), the [Flex SDK](http://flex.apache.org/) version 4.10+, and [playerglobal.swc files](http://helpx.adobe.com/flash-player/kb/archived-flash-player-versions.html#playerglobal) for Flash Player versions 10.2 and 11.4 added to the Flex SDK. Scratch is used in a multitude of settings and some users have older versions of Flash which we try to support (as far back as 10.2).