I dare anyone to try to install Flex 2 or 3beta as an Eclipse
3.3 plugin. Flex 3 has as requirement Eclipse 3.21 or above. Well
3.3 it's above! There are scores of people with the same problem.
Bad job Adobe!
The solution is to first install Flex as a standalone
application and then copy it's plugins files and folders to Eclipse
potential solution is to copy startup.jar from Flex to
Eclipse, and then install Flex as a plugin.
Can you file a bug in the Flex Bugbase (
about this issue. Please specify what errors / problems you are
seeing when installing Flex Builder 3 Beta as an eclipse 3.3