[horde] Login tasks memory exhausted

[Luis Felipe Marzagao]

Hi, List:

horde 5.2.16
imp 6.2.19

When running the login tasks I get stuck with an HTTP ERROR 500 at the 
address services/logintasks.php?app=imp

Looking at the logs I get:

Sep  4 07:52:31 sistema HORDE: [imp] Allowed memory size of 134217728 
bytes exhausted (tried to allocate 20480 bytes) [pid 25 397 on line 402 
of "/usr/share/php/Horde/Stream.php"]

Line 402 is "$read = fread..." below:

         while (!feof($this->stream) && ($to_end || $length)) {
             $read = fread($this->stream, $to_end ? 16384 : $length);
             $out .= $read;
             if (!$to_end) {
                 $length -= strlen($read);
             }
         }

         return $out;
     }


In php.ini I have:

memory_limit = 128M


Any pointers on how to further debug this?

Thanks.