[horde] PHP ERROR: Cannot modify header information - headers already sent by

[Brain Drain]

----- Original Message -----
> From: Michael M Slusarz <slusarz at horde.org>
> To: horde at lists.horde.org
> Cc: 
> Sent: Wednesday, February 1, 2012 1:05 PM
> Subject: Re: [horde] PHP ERROR: Cannot modify header information - headers already sent by
> 
> Quoting Brain Drain <braindead0 at yahoo.com>:
> 
>>  I'm trying to track down this error in horde 4.0.13
>> 
>> 
>> 
>>  Jan 31 16:05:01 phisch HORDE: [horde] PHP ERROR: Cannot modify header 
> information - headers already sent by (output started at 
> /usr/share/php/PEAR/Config.php:649) [pid 11316 on line 681 of 
> "/usr/share/php/Horde/Core/Auth/Application.php"]
> 
> You most likely have extra space at the beginning of one of your configuration 
> files.

Definitely not that.  

I noticed that I get these almost exactly every 5 minutes, which also happens to be the frequency I run horde-alarms.  I just confirmed that's what's causing the error by shutting down all clients and running horde-alarms manually.

When I run horde-alarms from root user I get a ton of warnings.

I seem to recall when originally setting up, some option that would check alarms every time someone hits the home page.. vs. running a cron job however that might have been something else.