Marking not a bug, unless data is provided to allow a developer to 
reproduce the issue.

No idea. Cannot reproduce any of this. It sounds like your share 
system is mis-configured or corrupt. Unfortunately you are going to 
need to track this down yourself as no dev can reproduce this.

Additionally I got this backtrace once in the browser window:


share parameter is not a Horde_Share_Object

  1. Horde_Core_Factory_BlockCollection->create() 
/usr/local/src/horde/horde/services/portal/index.php:31
  2. Horde_Core_Block_Collection->__construct() 
/usr/local/src/horde/framework/Core/lib/Horde/Core/Factory/BlockCollection.php:61
  3. Horde_Registry->getAppDrivers() 
/usr/local/src/horde/framework/Core/lib/Horde/Core/Block/Collection.php:43
  4. Horde_Registry->pushApp() 
/usr/local/src/horde/framework/Core/lib/Horde/Registry.php:1884
  5. Horde_Registry->_pushAppError() 
/usr/local/src/horde/framework/Core/lib/Horde/Registry.php:1530
  6. Horde_Core_Factory_BlockCollection->create() 
/usr/local/src/horde/horde/services/portal/index.php:31
  7. Horde_Core_Block_Collection->__construct() 
/usr/local/src/horde/framework/Core/lib/Horde/Core/Factory/BlockCollection.php:61
  8. Horde_Registry->getAppDrivers() 
/usr/local/src/horde/framework/Core/lib/Horde/Core/Block/Collection.php:43
  9. Horde_Registry->pushApp() 
/usr/local/src/horde/framework/Core/lib/Horde/Registry.php:1884
10. Horde_Registry->callAppMethod() 
/usr/local/src/horde/framework/Core/lib/Horde/Registry.php:1525
11. call_user_func_array() 
/usr/local/src/horde/framework/Core/lib/Horde/Registry.php:1137
12. Horde_Registry_Application->init()
13. Kronolith_Application->_init() 
/usr/local/src/horde/framework/Core/lib/Horde/Registry/Application.php:105
14. Kronolith::initialize() 
/usr/local/src/horde/kronolith/lib/Application.php:78
15. Horde_Injector->createInstance() 
/usr/local/src/horde/kronolith/lib/Kronolith.php:738
16. Horde_Injector_Binder_AnnotatedSetters->create() 
/usr/local/src/horde/framework/Injector/lib/Horde/Injector.php:213
17. Horde_Injector_Binder_Implementation->create() 
/usr/local/src/horde/framework/Injector/lib/Horde/Injector/Binder/AnnotatedSetters.php:69
18. Horde_Injector_Binder_Implementation->_getInstance() 
/usr/local/src/horde/framework/Injector/lib/Horde/Injector/Binder/Implementation.php:66
19. ReflectionClass->newInstanceArgs() 
/usr/local/src/horde/framework/Injector/lib/Horde/Injector/Binder/Implementation.php:86
20. Kronolith_CalendarsManager->__construct()
21. Kronolith_Calendar_Internal->__construct() 
/usr/local/src/horde/kronolith/lib/CalendarsManager.php:128

Unfortunately yes, even if I try in basic view and  try to browse 
administration/configuration to update the database I got white page 
and these in the apache log:


[Thu Jan 30 06:56:23 2014] [error] [client 192.168.10.200] PHP Fatal 
error:  Call to a member function get() on a non-object in 
/usr/local/src/horde/turba/lib/Turba.php on line 475, referer: 
https://mysite.hu/services/portal/index.php
[Thu Jan 30 06:56:23 2014] [error] [client 192.168.10.200] PHP Fatal 
error:  Call to a member function get() on a non-object in 
/usr/local/src/horde/turba/lib/Turba.php on line 475, referer: 
https://mysite.hu/services/portal/index.php
[Thu Jan 30 06:56:23 2014] [error] [client 192.168.10.200] PHP Fatal 
error:  Call to a member function get() on a non-object in 
/usr/local/src/horde/turba/lib/Turba.php on line 475, referer: 
https://mysite.hu/services/portal/index.php


Updating 041ac8d..7fdf7f1

Is this still happening for the OP with current Git?

I think it is. I reverted back to 041ac8d and there is no problem.
What should I do to backtrace this problem?

Cannot reproduce. Additionally, I really don't see anyway for $share 
to NOT be a share object in that code. Perhaps check that your share 
configurations are all correct?

After upgrading from 041ac8d to 03ec99d I got this error:
PHP Fatal error:  Call to a member function get() on a non-object in 
/usr/local/src/horde/turba/lib/Turba.php on line 475