Why is my Flex Beta 2 SWF bigger?

We’ve seen a number of concerns raised about the size of the SWF in Beta 2. We may not have been vocal enough about some workflow changes that we made to make debugging better and build times faster: the fact that we now produce debug SWFs normally in Flex Builder and use the new Export Release wizard for producing an optimized SWF (instead of creating two SWFs, the normal one and -debug). Tim Buntel, our new Flex Builder Product Manager (but longtime Adobe co-worker) has written up more of an explanation on his blog.