McAfee has just posted some info to the support login page about why the Patch 1 was removed. Below is what they say:
IMPORTANT: VSE 8.7i Patch 1 Update
Windows XP and Vista computers running VirusScan Enterprise v8.7i Patch 1 have sporadically reported that a false detection of W32/Generic.worm.aa occurs on some files. This appears to be associated with Patch 1 specifically, and not with VSE 8.7i.
To minimize customer impact, McAfee has temporarily removed Patch 1 from the ServicePortal and the download site. After we have identified the root cause of the problem and taken the appropriate steps to resolve this issue, we will repost VSE v8.7i Patch 1.
Customers should contact McAfee Support if they have questions regarding this issue, and check the McAfee ServicePortal for further updates. For more information, please see KB article KB65943.