InterScan Web Security Suite (IWSS) for Linux 3.1 may fail to detect virus code within the compressed files of trusted URLs if the scan_trusturl_without_ftblock hidden feature has been enabled.
Hot Fix Build 1185 enhances the internal scan logic to address the mentioned issue.
Release Date: January 8, 2010
Trend Micro recommends applying patches or service packs instead of individual hot fixes whenever possible.