I found the Mcafee has release the a 32-bit pm scanner that uses the 4.1.60 engine (which is the same as the windows version). Once you update the dat files to the latest ones, you have a great virus scanner from McAfee that finds all the known new viruses.

When using virtual hosts with some versions of the server, if a user requests an url for a directory but omits the trailing slash, the server will issue a 302 redirect to the wrong host. This module intercepts incoming requests and performs correct 302 redirects on directory urls that do not have the trailing slash, thereby preventing the bug from manifesting. Source is included with the precompiled DLL.