Can you confirm the version your project is actually using is the 2012.2.714? I am asking this because there were some problems with the rendering of some input controls with the Q1 2012 version, but they should be fixed in Q2 2012.
In the meantime you can try setting their EnableSingleInputRendering property to false.
Another thing you can try is removing all your custom CSS from the form to see if there is a change there that is actually affecting the controls.
If none of the above helps I suggest you post the problematic markup so we can see the actual issue and help.
On a side note - it is better if you post your questions in the relevant forum where people will be able to assist you better.
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