VerifyError: Error #1033: Cpool entry 29 is wrong type.

Was having a problem with an AIR project that published without any bugs in CS3 when I tried publishing in CS4.

So as a test, I simply created a new AIR file in CS4

File-New...Flash File(Adobe AIR)

put a stop() action on frame 1, then tested in the IDE.
I get the following error

VerifyError: Error #1033: Cpool entry 29 is wrong type.

at runtime::ContentPlayer/loadInitialContent()
at runtime::ContentPlayer/playRawContent()
at runtime::ContentPlayer/playContent()
at runtime::AppRunner/run()
at global/runtime::ADLEntry()

Has anyone encountered this?