I have an app who's flashVars work on webpages but not in the debugger. The values are null when running under the Flex 3 debugger. I modified the <object> and <embed> tags in the index.template.html to add the flashVars and it propagates to my <project>.html file after a build.
I looked through the documentation and there's nothing in there about *not* being able to use flashVars in the debugger. Anyone else experience this behavior?

