well im on RC5.... There is no limitation in the size of the password which can be set (AFAIK), which is great!
*but* in the HTML source of the login page, the textbox is limited to 12 chars. My passwords are normally 20+ chars alphanumeric.
What im saying is that although i dont mind a 12 char limit (i thought it was 9 originally but its 12 apparently) it would be good if amule told you that when you set the password, and not when you spend 2 hours wondering why your password didnt work. When your entry is replaced by ****** you normally dont count to see how many *'s there actually are. (i did though, thats how i figured it out in the end!)