Sorry, my last post does sound weird. Log in to your phpbb admin panel, under the USER ADMIN section, click on MANAGEMENT and look up the profile and settings of the user that is spamming you. If the board language is set to Albanian, your probably getting spammed by the same person that was spamming my forum.
I was getting about 10-20 fake members a day. No posts, just registering to get a backlink to their site. I tried several fixes, including a pop up window that makes the person registering answer a simple question to proceed to throw off a spambot, but nothing worked. I finally figured that he was either manually creating the ids, or was using software that somehow bypasses the registration page.
I was finally able to fix my spam problem - let my know what you find, if its the same person or software, I think I can help.