This Tuesday IE patch causes EAF+ errors with EMET 5.0. This new release fixes that among other improvements.
http://blogs.technet.com/b/srd/archive/2014/11/10/emet-5-1-is-available.aspx
http://support.microsoft.com/kb/3015976
http://blogs.technet.com/b/srd/archive/2014/11/10/emet-5-1-is-available.aspx
http://support.microsoft.com/kb/3015976
Changes and improvements
General improvements
Enables the EMET service to log EMET configuration when the service is started.
Resolves a potential race condition in the Mandatory ASLR mitigation.
Addresses an issue in which some mitigations stop working if EAF is disabled.
Addresses errors that occur if EMET is not installed in the default folder.
Improves and hardens several mitigations to make them more resilient to attacks and bypasses.
Application compatibility issues
Addresses application compatibility issues between Certificate Trust and 64-bit Internet Explorer.
Addresses application compatibility issues between EAF+ and several applications, such as Internet Explorer, Adobe Reader, Adobe Flash, and Mozilla Firefox.
Addresses application compatibility issues that affect Internet Explorer Developer Tools and the Manage Add-ons feature.
Improves EAF mitigation to address several application compatibility issues.
Configuration and deployment improvements
Adds a default configuration for EAF+ for Google Chrome and Oracle Java 8.
Adds the "Local Telemetry" feature that allows you to save memory dumps locally when a mitigation is triggered.
Addresses an issue in which Group Policy settings in some circumstances are not applied correctly.