A quick follow up to an earlier post I put up on the blog concerning Libpcap version 1.5.2: http://blog.snort.org/2014/01/reported-libpcap-152-issues.html
Libpcap has release 1.5.3 which appears to fix the issues caused by 1.5.2. We haven't fully tested it, but under initial assessment, it seems to clear up the issues.