Issues with Flex 4 SDK under Flex Builder 3

Question

I have managed to adjust Flex Builder 3 to work with the Flex 4 SDK thanks to this article. However, some strange things are happening. I changed all the namespaces as suggested, but I cannot get anything from the fx: namespace using the Flex Builder code completion, as well as the spark List class.

Answer 1

Those problems are pretty much a Fact of Life. I recommend upgrading to Flash Builder 4.