If your running into error with IntelliJ IDEA after upgrading to 9.0.3 you may want to try the tip below:
If you just upgraded from 9.0.2 to 9.0.3 you may want to invalidate your caches (File > Invalidate Caches … then restart IDEA). There was a change along the way to the Flex support that caused old indexes/caches to not work for some people. That resulted in most of the core Flex code to show as errors, and would break code completion. Error highlighting and code completion depend on the indexes created in the IDEA cache. After invalidating the caches and restarting, IDEA will need to re-index your project at startup.
When updating Java on OSX you may run into issues with Flash Builder afterwards. One of the issues that always forget is to update your Java Preferences ensuring that 32-bit runtimes preferred first for Java applications.
Check out the ActionScript Framework Downloader to download misc AS3 libraries straight to the current project. A great plug-in to help speed up development.
This is a great post by Jon Rose. I know that I was laughing for a bit about reason number two in the facetious list: “You like spending time debugging your Ajax applications in all the different browsers and versions.”
