When I or users have logged in over the past two days the login process hangs (it was previously fine). I have reset the server and then moodle (1.8) works fine. But, I also have a development version of moodle (1.9.2) on the same server and that works fine even when the live version hangs, so it doen't appear to be server fault. The development version of moodle is not live to the internet but the current 'live' version is. Does anybody know what could be causing this crash to occur.
Thanks