Everytime i try to play online/multiplayer it does the usual thing by saying logging in then when its done it might load the game for a second but then the error comes up saying "Internal exception: java.io.UTFDataFormatException: malformed input around byte 0" and with the byte 0 its varys between 0 to 7 so far HELP!!!!!!
Beta got updated from 1.1 to 1.2. When that happened, everything got ****ED up and almost all of the server admins have given up.
That's why you are getting that error.
HAVE FUN WITH MINECRAFT!