I "solved" this problem like this:

#gedit /etc/xdg/autostart/trackerd.desktop

and then I changed the value here 
X-GNOME-Autostart-enabled=false (it was true)

Well this just disables running tracker right?

Yes it just disables tracker. 
I had this problem for 3 months (UbuntuStudio 8.04), 
I dint have the problem when I used sudo to run an application, so I though that the problem was something at my user`s settings. I made  a second user none of these problems happen again. 
But I am in Linux and I dont like to stop using my first user ;) So I 
try to see the deferents of these 2 users , I was believing that somewhere there was the problem. So I check ~$ cat $HOME/.gtk-bookmarks at both users and everything was ok, then I look gconf at both users everything ok there too.
After that I look at  $HOME/.config/tracker/tracker.cfg because I find some bugs report at Ubuntu and people there said that the problem is from trackerd. 
But also all settings was the same for both users, then I command killall trackerd and the problem fixed at the user who has had the problem but only until next reboot. 
So I decided to disables trucker when I wrote this 
https://lists.ubuntu.com/archives/ubuntu-devel-discuss/2007-September/001830.html

ps. sorry about my English I am just a farmer for Greece :)

Yes it just disables tracker. 
I had this problem for 3 months (UbuntuStudio 8.04), 
I dint have the problem when I used sudo to run an application, so I though that the problem was something at my user`s settings. I made  a second user none of these problems happen again. 
But I am in Linux and I dont like to stop using my first user ;) So I 
try to see the deferents of these 2 users , I was believing that somewhere there was the problem. So I check ~$ cat $HOME/.gtk-bookmarks at both users and everything was ok, then I look gconf at both users everything ok there too.
After that I look at  $HOME/.config/tracker/tracker.cfg because I find some bugs report at Ubuntu and people there said that the problem is from trackerd. 
But also all settings was the same for both users, then I command killall trackerd and the problem fixed at the user who has had the problem but only until next reboot. 
So I decided to disables trucker when I wrote this 
https://lists.ubuntu.com/archives/ubuntu-devel-discuss/2007-September/001830.html

ps. sorry about my English I am just a farmer for Greece :)

I aslo want to say that kde applications at my Gnome (konqueror, k3b, kaffeine, amarok etc) didnt had that problem when I used them. Only at gnome applications the problem was existed. 

thank you.   

(In reply to comment #0)
> If the trackerd process (or even the extract process I think) crashes, some
> GTK+ apps (Brasero, Sound-Juicer) take a long time to start. Others like GEdit
> start fine but opening the file chooser takes a lot of time. I suspect
> tracker's filechooser integration is causing this. Stracing those apps revealed
> them waiting for a time out after some "resource not available".
> 
> Ideally tracker would not crash but until that day, is there a way to make the
> GTK integration fail less painfully?
> 

Hi,

Do you have any real evidence that Tracker is causing you problems? GTK+ apps don't all depened on Tracker. It could be that tracker was using your system resources but there is a 25 second (or so) timeout before it starts doing anything from boot up.

http://ubuntuforums.org/showthread.php?p=7201992#post7201992

I was having the same problem after upgrading to Jaunty, I removed, then reinstalled tracker and everything's working OK now. 

This is fixed in 0.7