Phpbb
1) Change the mail administrator
2) After the registration you are alerted to the receipt of an email with a link to activate the profile, and only on this mail link reports an error in the database, as if the registration had not been successfully completed, whereas the profile c ‘and is already active, or delete in whole or part of this system error (I would prefer to remain safe against spamm bot)
3) The generator of random images for the recording is often indecipherable you can not understand what was written, nor indicate whether they accept uppercase and lowercase letters, maybe put a simpler because then there is also the arithmetic to be included
4) Centering the homepage and the forum in all resolutions since motions in cases is displaced from the center or one or the other