FLA files created on Flash CS4 are publishing bigger SWF when imported to CS5

I have a big project created on Flash CS4, and now we're migrating to CS5. The problem is that some SWF files are getting a lot bigger than before, like 3.147 KB file, going to 3开发者_JS百科.901 KB, making this migration inacceptable.

Someone can give me some advice?

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When you publish from flash, check the option to publish a size report under publish settings on Flash tab. You will be able to compare the export size of each item. My guess it is the difference in the font export options between CS4 and CS5.