I'm running a Windows 2008 R2 server with Apache Tomcat serving a webapp. We're using Jespa for single sign-on. We have two servers running same config. One server works fine, but the other sometimes doesn't use the single sign-on and reverts to the webapps login page or if it does allow for SSO the webapp's login box will appear in the webapp. This seems to have started when we upgraded Java to version 7.0.55, but it works fine on the other server.
All users are on Windows 7 with IE 10 or IE 11.