I always recommend this book to people that feel they're about to be canned, or who were canned but can't figure out why. It seems you know the cause when you wrote:

"I stirred the pot on the distinction between corporate and startup marketing to be sure."

Here's the book: http://www.amazon.com/How-To-Survive-In-Organization/dp/1933...

It's one of those books everybody reads but nobody says they are reading.