What this message when I closing Gedit application?

[Hammer Attila]

Dear List,

When I editing a document with Gedit in my Lucid system and closing the 
editor, I see in terminal with this message:
hammera at hammera-laptop:~$ gedit
sys:1: Warning: g_object_new: assertion `G_TYPE_IS_OBJECT (object_type)' 
failed

** (gedit:2076): CRITICAL **: atk_object_initialize: assertion 
`ATK_IS_OBJECT (accessible)' failed
hammera at hammera-laptop:~$

Why presenting this message when I closing Gedit?
When I launching gedit for example the gedit apple.txt command, this 
message is not presenting my display before I closing gedit application.
The problem is important I think, because some time possible this 
problem freezing my system entire, but I am not sure this freeze related 
with this problem or not.
Anybody see random system freezing problems when editing a document with 
gedit, or this is my system happening only? My system is full uptodated. 
I am not see this problem before this day.

Possible full reinstall solving my problem?
I am very like using Ubuntu Lucid development version and I no this is 
the development release. :-):-)

Attila