It has been determined that there was a minor inconsistency with the 2008r2 Default Domain Policy implemented two weeks ago: http://sysnews.ncsu.edu/news/4d33a91d
Group Policy name: WolfTech Default Domain Policy – WS08R2
The setting that specifies the default firewall log file path was missing from the Domain firewall profile. The setting exists for the Public and Private firewall profiles. This has been corrected.
There is no functional changes caused by this as it only affects the path to the file, and it is being set to the default location. So a log file that already exists will simply start getting log info.