On Xbox, it'll involve finding the identity code at the top of your character screen in ME2, copying it with pen and paper and putting it in ME3 on the console's unutterably tedious onscreen keyboard. If you're playing on a PC you can use this fan-made tool to do the job. If you copy your code from ME2, you can painstakingly enter it into the ME3 character import tool. There are workarounds available: the codes Priestly refers to is a long series of letters and numbers that represent the specific values of your character's face - what colour their hair is, what shape their ears are.
'The Mass Effect team continues to investigate fixes for these issues and they are top priority concerns for 'We have determined that faces importing incorrectly is an error with how codes were detected when transferred from Mass Effect 1 into Mass Effect 2 and then on into Mass Effect 3,' BioWare's Chris Priestly wrote on the game's community forum. The choices you made in the first two games are unaffected, but gamers particularly attached to their Commander Shepards are up in arms.
The bug means some characters created in the original Mass Effect fail to import their beautiful custom faces. UK gamers sitting down to Mass Effect 3, the most exciting release of the year so far, were crushingly disappointed on Friday night when a bug meant they couldn't import their existing characters properly.