Here's an extract from the
W32.Imsolk.B@mm threat page that says rev 049 protects you from it.
Therefore we shouldn't have to download any Rapid Release versions.
W32.Imsolk.B@mmRisk Level 3: Moderate
Discovered: September 9, 2010
Updated: September 10, 2010 7:07:08 AM
Also Known As: W32/Autorun-BHO [Sophos],
W32/VBMania@MM [McAfee], WORM_MEYLME.B [Trend]
Type: Worm
Infection Length: 290,816 bytes
Systems Affected: Windows XP, Windows Vista, Windows Server 2003, Windows
2000
W32.Imsolk.B@mm is a mass-mailing worm that also spreads through removable and mapped drives. It additionally spreads through shared folders and instant messaging and attempts to download files on to the compromised computer.
Other resources
For more information, please see the following resource:
New round of email worm, "Here you have"
Antivirus Protection Dates
Initial Rapid Release version September 9, 2010 revision 037
Latest Rapid Release version September 9, 2010 revision 037
Initial Daily Certified version September 9, 2010 revision 049
Latest Daily Certified version September 9, 2010 revision 049
Initial Weekly Certified release date September 15, 2010