I have been running a CVS version of moodle and have been trying to keep it updated about every week. Lately after loading CVS, I changed to the formal white theme and I started having a problem. I am not able to log in! After typing in user name and password, I get another screen for a few seconds, I can read something about not able to pass header information and I am able to read something about the theme directory for a split second then it returns me to the login screen without being logged in. I am stuck. Since I can't log in now, I am not able to go back and change themes.
This CVS installation has been working for the past six months at least. Any help would be appreciated.