TF300 gets hot while charging after Jelly bean updated?

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http://forum.xda-developers.com – I think it isn't normal as my TF300 gets really hot (at the back&front of 3.5mm headset jack side) while i charge it today. (35oC if screen is off and ~39oC if i using the tab and charge at the same time.) Because i just bought my tab 2 days ago and i ony spent 1 day to use it with ICS before updated to Jelly bean this morning; but i don't think my tab was hot like this when i charged it yesterday. (FYI, i owned motorola xoom & galaxy tab 10.1 before and they never get hot like this while charging )Could this be Jelly bean problem or because we have speed charger( can fully charger the (HowTos)