Certain security changes have been made to the ACM website that will be noticeable to anyone logging in. Certain sections of the website now use https instead of http, most notably the login section and any page under /user. If you have not already accepted the ACM's ssl cert in your browser you will be prompted to the next time you try and log in. All other acm.cs.uic.edu sites that were originally secured with https should not have been affected by the implementation of this feature. However, if you find a problem with one of those site, please report it to me (either in email or as a comment) and include all relevant information.