From nosolution.net

"We are planning some upgrades to this server scheduled for Thursday the 3rd of August 2006, Downtime will start at approximately 10am MST, and may last up to several hours. Also note all accounts will be locked on August 1st to ensure all contents of each account are accurately moved."

Basically this mean that at that time the downloads will be down, as well as most forum images. So you may have difficulty posting if your browser doesn't show a broken image icon by default like Internet Explorer does. The forums will still be avaliable for browsing though as the upgrade doesn't affect Invisionfree but Unitedti.