[xwiki-users] XWiki 4.3 will not maintain logged in status of users

I apologize if this issue is somewhere out in this user list, the web or on xwiki.org docs, but I am unable to find anything out there on it. We're using XWIki 4.3-rc-1 running under Tomcat 7.0.32 on Red Hat 5.7 64-bit. Everything was working fine. Then, all of a sudden, all users are prompted to login after every click. It's now impossible to import or export any content. Editing is impossible. In the catalina.out from tomcat, we see the following over and over again: 2013-01-28 14:11:04,531 [https://epswiki.sdc.vzwcorp.com/xwiki/bin/login/XWiki/XWikiLogin?srid=BOeR3…] DEBUG o.x.c.ExecutionContext - Getting undefined property localization.bundles from execution context. 2013-01-28 14:11:04,534 [https://epswiki.sdc.vzwcorp.com/xwiki/bin/login/XWiki/XWikiLogin?srid=BOeR3…] DEBUG .s.DefaultScriptServiceManager - Failed to lookup script service for role hint [workspace] org.xwiki.component.manager.ComponentLookupException: Can't find descriptor for the component [role = [interface org.xwiki.script.service.ScriptService] hint = [workspace]] at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:355) ~[xwiki-commons-legacy-component-default-4.3-rc-1.jar:na] I am unable to find anything that can point me to where our configuration has gotten hosed. We are configured to use LDAP authentication against an MS Active Directory domain. As stated earlier - that has been working fine - and this just started happening. Any direction in how we can get this corrected would be greatly appreciated. Thanks, Casey