Could you add the output of print_r(get_loaded_extensions()) to this report?

$php -r "print_r(get_loaded_extensions());"
Array
(
    [0] => Core
    [1] => date
    [2] => ereg
    [3] => libxml
    [4] => openssl
    [5] => pcre
    [6] => zlib
    [7] => bcmath
    [8] => bz2
    [9] => calendar
    [10] => ctype
    [11] => dba
    [12] => dom
    [13] => hash
    [14] => fileinfo
    [15] => filter
    [16] => ftp
    [17] => gettext
    [18] => SPL
    [19] => iconv
    [20] => json
    [21] => mbstring
    [22] => pcntl
    [23] => session
    [24] => posix
    [25] => Reflection
    [26] => standard
    [27] => shmop
    [28] => SimpleXML
    [29] => soap
    [30] => sockets
    [31] => Phar
    [32] => exif
    [33] => sysvmsg
    [34] => sysvsem
    [35] => sysvshm
    [36] => tokenizer
    [37] => wddx
    [38] => xml
    [39] => xmlreader
    [40] => xmlwriter
    [41] => zip
    [42] => curl
    [43] => gd
    [44] => imap
    [45] => mcrypt
    [46] => mysql
    [47] => mysqli
    [48] => PDO
    [49] => pdo_mysql
    [50] => suhosin
    [51] => mhash
)

Could you check if you can reproduce the problem with suhosin disabled?

Yes, tomorrow. But the same code ran fine on 5.3.5 on the same machine.

Just found out it happens only when using namespaces. Without the namespace I didn't get the error. Also I can say the error occurs ones on ~1000 calls on the file. Really strange.

I see this as well, for me it happens all the time...

I have this code:

---

namespace SquadMixer;


use Glint\CommonMagic\DataFormatter as DataFormatter;
use Glint\CommonMagic\Debugging as Debugging;
use Glint\CommonMagic\GlintException as GlintException;


//{{{ Registrar
class Registrar extends ModelEntity {

    private static $REGISTRATION        = 0;
    private static $UPDATE              = 1;
    private static $PASSWORD_REQUEST    = 2;

...

---

self::$REGISTRATION and self::$UPDATE always work.

self::$PASSWORD_REQUEST always fail with:

PHP Fatal error:  Access to undeclared static property: 
SquadMixer\\Registrar::$PASSWORD_REQUEST

Strangest thing ever...

I take back my report. It was user error in my case. Code on the server was not in 
synch with local repository.
My bad, sorry.

Closing as bogus.