It's most likely C02. It's possible that it could also be a mild bacterial infection (there is one that shares the same symptoms of "white film on top"), but it's nothing to worry about. If it doesn't smell or taste bad/funky, you're fine. Even if it does, there are many who drink infected (not saying yours is, since it's most likely not) beers after giving them a while to mellow out, or after adding flavoring to them.
Taste it, smell it, and bottle it.
By the way, can you post a picture of it?
Brew Blog: Three Taps Brewing
Primary: Centennial Blonde Ale, Deception Cream Stout Secondary: Empty.
Bottle Conditioning / Drinking: Pumpkin Spice Ale, Cherry Wheat Ale, Bee Cave IPA, EdWort's Apfelwein.
R.I.P.: Bee Cave Haus Pale Ale, Oatmeal Stout, Pecan Scottish Ale, Nut Brown Ale, Blonde Ale.
Brewing Since August 17, 2009
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Originally Posted by shortyjacobs
You definitely win my award for "Most Enthusiastic New Brewer".
Last edited by ThreeTaps; 10-15-2009 at 03:15 AM.