We've been using Frontmotion 3.5.5 for too many years, and we're working to push an update to Firefox using SCCM. However, we've run into a bit of a show stopper. We uninstalled Frontmotion 3.5.5, then installed Firefox 5.0 and customized it using a CFG file (not encrypted). The behavior we're seeing is that it opens, and a few seconds later it closes; no error, no entry in event viewer, no crash report from about:crashes. It opens fine in safe mode, but even if we disable everything we can find, it won't run outside of safe mode. Sometimes, it will actually work fine for up to maybe an hour or two, but then it either disappears like that or crashes, generating an application event log entry. We pushed Firefox 7.0.1 instead, then, hoping that it was a known issue that had been fixed, but 7.0.1 is doing the same thing. This is happening on 3 of the 7 machines we've pushed to so far. We use roaming profiles, and so far the problem seems to be related to something on the machine rather than the profile; a local profile has the same behavior and users with the problem seem to be able to work fine on other computers with FF7 installed. I've actually gone as far as utilizing Windbg to try to isolate the culprit, but I haven't had a lot of success. Can anyone help, perhaps?