You still need to remove the 'http://' from web links, but I think this is certainly a bearable problem compared to what we've experience earlier.
(Psst. This is just trying to get more of you to come back. We miss you! ;o;)
EDIT: For clarification, the 'www' still will not work in the chats for a web address.
Also, it seems that if you're using Trillian, this may not be an issue.
I'm not sure if it matters what version of AIM you are using - I suggest you upgrade though, if you're having problems still.
Please read the comments for further input and information, as I don't know every detail about this issue and other members might be more helpful. :)