[horde] "" driver (for Horde_Image not found)

[Corinne Le Moan]

Hi,
since last upgrade (2.5.0 to 2.5.1), it is not possible for horde to 
display html messages with images. I didn't modify anything in 
configuration.

The message pane is blank and user gets an error ("Server error").
The ajax POST request /horde/services/apax.php/imp status code is error 500.



In log, I've got theses messages :

2015-01-08T17:03:50+01:00 DEBUG: HORDE [imp] "" driver (for Horde_Image 
not found). [pid 32343 on line 85 of 
"/usr/share/pear/Horde/Core/Factory/Base.php"]
2015-01-08T17:03:50+01:00 DEBUG: HORDE  1. 
Horde_Core_Ajax_Application->doAction() 
/usr/share/horde/services/ajax.php:61
  2. call_user_func() /usr/share/pear/Horde/Core/Ajax/Application.php:175
  3. IMP_Ajax_Application_Handler_Common->showMessage()
  4. IMP_Ajax_Queue->message() 
/usr/share/horde/imp/lib/Ajax/Application/Handler/Common.php:682
  5. IMP_Ajax_Application_ShowMessage->showMessage() 
/usr/share/horde/imp/lib/Ajax/Queue.php:451
  6. IMP_Contents->getInlineOutput() 
/usr/share/horde/imp/lib/Ajax/Application/ShowMessage.php:296
  7. IMP_Contents->renderMIMEPart() 
/usr/share/horde/imp/lib/Contents.php:1462
  8. Horde_Mime_Viewer_Base->render() 
/usr/share/horde/imp/lib/Contents.php:654
  9. IMP_Mime_Viewer_Images->_renderInfo() 
/usr/share/pear/Horde/Mime/Viewer/Base.php:163
10. IMP_Mime_Viewer_Images->_getHordeImageOb() 
/usr/share/horde/imp/lib/Mime/Viewer/Images.php:168
11. Horde_Core_Factory_Image->create() 
/usr/share/horde/imp/lib/Mime/Viewer/Images.php:255
12. Horde_Core_Factory_Base->_getDriverName() 
/usr/share/pear/Horde/Core/Factory/Image.php:22

Any Idea ?

Corinne