Frequent error messages

Hello,

My console log is filled with error messages relating to Sohpos AV and Google Chrome. Here is a small sample:

2013-07-04 7:52:09.741 PM Google Chrome[4697]: Cannot find function pointer SUMCMPluginFactory for factory C1DF11E5-FD12-45AD-BBE4-EE058CB88A16 in CFBundle/CFPlugIn 0x7e647e10 </Library/Contextual Menu Items/Sophos Anti-Virus.plugin> (not loaded)
2013-07-04 7:52:20.390 PM Google Chrome[4697]: Cannot find function pointer SUMCMPluginFactory for factory C1DF11E5-FD12-45AD-BBE4-EE058CB88A16 in CFBundle/CFPlugIn 0x7e647e10 </Library/Contextual Menu Items/Sophos Anti-Virus.plugin> (not loaded)
2013-07-04 8:09:48.078 PM Google Chrome[4697]: Cannot find function pointer SUMCMPluginFactory for factory C1DF11E5-FD12-45AD-BBE4-EE058CB88A16 in CFBundle/CFPlugIn 0x7e647e10 </Library/Contextual Menu Items/Sophos Anti-Virus.plugin> (not loaded)
2013-07-04 8:19:11.884 PM Google Chrome[4697]: Cannot find function pointer SUMCMPluginFactory for factory C1DF11E5-FD12-45AD-BBE4-EE058CB88A16 in CFBundle/CFPlugIn 0x7e647e10 </Library/Contextual Menu Items/Sophos Anti-Virus.plugin> (not loaded)
2013-07-04 8:21:41.347 PM Google Chrome[4697]: Cannot find function pointer SUMCMPluginFactory for factory C1DF11E5-FD12-45AD-BBE4-EE058CB88A16 in CFBundle/CFPlugIn 0x7e647e10 </Library/Contextual Menu Items/Sophos Anti-Virus.plugin> (not loaded)

What steps must I take to remedy this?

I am running the latest versions of OS X, Chrome, and Sophos AV.

Thank you.