I keep getting this error with every SDK after and including release 18.104.22.16899.
I noticed in the release notes that the skins were now included as a Runtime Shared Library (sparkskins.swc). But I don't know how to make the compiler include it when building the app (if that is the problem). Anyway, even if I start with a new project and an empty mxml-file I get the error 1014 above. And it is always followed by this error:
ReferenceError: Error #1065: Variable _cee9af537b39795a3bd1729ebe7d63f3803fa353596b9c82a79ce2891eb0f825_flash_display_Sprite is not defined.
If you are using Flash Builder, please go to Project->Properties->Build Path->Library Path->Framework Linkage and select 'Merged into code'.
This is a known issue:
Hope this helps
Ok, sorry for reposting.. but I actually didn't find it while searching the forums, instead it came up as a suggested similar post once my post was done. Anyway, here was the answer: