Using NIS for Mac 5 5.6(20), Firefox 32.0.3, OS X 10.9.2 (Mavericks). Since installing Mavericks, Norton has been opening internet access blocking boxes for multiple applications that are already listed as "Allow" in Norton Firewall Application Blocking. No matter how many times I select "Always allow..." they continue to reappear as if I never made the selection. In addition, many times the SymUIAgent box appears asking for the admin password. This never occurred with OS X 10.8 (Mountain Lion).
This has become so time consuming and aggravating that I am considering uninstalling NIS unless there is a reasonable solution available.