Warp2Search has posted a news story about a missing USB update
Microsoft has published a Knowledge Base article on July 17th, 2003 in which the Redmond based company claims to have released a Windows XP SP1 USB 1.1 and 2.0 Update to the proprietary WindowsUpdate service.Read more
Although the article explicitly declares the update as available, it is not. W2S editors have checked WindowsUpdate with both german and english language versions of Windows XP. One could easily declare this update as an USB rollup package as it fixes the tiny amount of only 8 issues discovered with USB support in Windows XP.