Since today, I often can not see some logfiles: Instead, a second "ISPConfig" banner shows up at the bottom of the fronend.. see screenshot. I have ISPConfig 3.0.3.3 on Debian 6.0.2
Does the same thing happen in every Web browser you try (e.g., Chrome, IE, Safari, etc.)? I'm trying to determine whether your issue is server-side or client-side.