Don't worry. If there is anything wrong with the leather, you would have smell it at the store. My GP had a bad smell from the very beginning and it never went away. I thought it was the glue or the dye and it would go away after a while but it didn't. If it was the leather fragance like Clemence, those will fade over time with exposure and use unless you really stick your head in there.
Hmmm, I'm not sure this is true though. IF said that the smell in her epsom birkin only is evident when exposed to heat.