News via http://wololo.net/wagic/2010/12/24/t...9%8b%e7%82%8e/

Many people have been complaining that the Hen released a few hours ago is not working correctly on some PSP3000 models. Chinese developer 忠贞炙烈之炎 (virtuous flame) has posted an unofficial fix for the issue. The “hack” fixes a problem were TN Hen doesn’t correctly recognize newer models of PSP3000. (For those who don’t know, some PSP300 are recognized as 3g, but newer ones as 4g).

I haven’t tested this fix myself (my PSP3000 is now running 6.31), so use at your own risk and report here