ProxyAV using Kaspersky 8 have not received updated pattern files since January 26th 2012 [Resolved: 06:23 UTC on February 14, 2012]
ProxyAVs using Kaspersky running 126.96.36.199 through 3.3.x are affected as they use Kaspersky 8. ProxyAVs running 188.8.131.52 and older, which uses Kaspersky 5, and 3.4.x.x and newer, which uses Kaspersky 8.1, are not affected.
Starting on January 26th 2012 ProxyAVs running 184.108.40.206 through 3.3.x that are using Kaspersky are no longer receiving updated pattern files. These ProxyAVs will continue to scan files using the pattern files received prior to January 26th 2012.
Issue resolved at06:23 UTC on February 14, 2012
While the issue was occurring, upgrading to AVOS 220.127.116.11 or newer which updates the Kaspersky engine to 8.1 was an option for resolution as Kaspersky 8.1 was not affected by this problem.