[mnemo] img/horde error with mnemo

[Thomas]

Dear all,

If i try open an eMail, then I recieve an error (horde.log):

Apr 10 10:45:10 HORDE [debug] [mnemo] Hook _horde_hook_share_init in  
application horde not called. [on line 1587 of  
"/usr/local/lib/php/Horde.php"]


and if try again, then an error at my screen:

Fatal error: Call to undefined function: getname() in  
/usr/local/lib/php/Horde/Share.php on line 553


Can u help me?

Thomas