Flex App Runs on IOS Fine; Android Sucks

Hi,
I have created a mobile app for the iPad, and it works great. However, I am using FB to publish an Android version as well. On the Samsung Galaxy Tab ther app runs like molasess. The app freezes and has layout issues. What could cause this? I thought Flex was platform independent.
thx

thanks for your help Colin but that isnt it because it was working before.
Its still writting now but the error occurs in a particular spot in the code (the problem does not exist on iOS).
Luke

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