My tiki wiki has started to have a weird issue. The User Preferences page now results in a 500 server error. I'm not sure exactly when it started. Probably sometime in December and I've spend the last month trying to figure it out. I know that it used to work but now doesn't. The file has the same last modification time as all the other files in the directory which was the install time. I was on tiki 17.1svn when it started and upgraded to 17.2svn as part of troubleshooting to no avail.
The error I find in the error logs is:
End of script output before headers: tiki-user_preferences.php
I haven't been able to use that very constructively. I have had the professional admin/IT analyst of the shared hosting in use at my institution look into this and she couldn't figure it out either. Any idea why I get this error and why it would (to my knowledge) only occur on this one page? And most importantly any ideas on how to fix it?