[Tracker] Metadata search Tracker Gnome

[John Bestevaar <Josephus people net au>]

Installed stable but old Tracker 0.8.17 on Ubuntu 10.04 Gnome. :-)
Using Graphical User Interface to do a test search of metadata in an 
image file on my desktop.
Result: Found the image by its filename( qpw.jpg ) but not by my  
metadata search term ( Beaudesert ) in the IPTC or XMP of the image. :-(
I am guessing that the executable file "tracker-extract" though 
installed is not reachable by "tracker"  GUI for some reason.
Browse with Nautilus to my location /usr/lib/tracker contains also 
executable files:
/usr/lib/tracker/tracker-extract
/usr/lib/tracker/tracker-miner-fs
/usr/lib/tracker/tracker-search-bar
/usr/lib/tracker/tracker-store

Terminal:
johnb johnb-desktop:~$ which tracker-extract =-O
johnb johnb-desktop:~$ which thunderbird
/usr/bin/thunderbird :-)
The command "which" and name of application"thunderbird" above shows, i 
assume, that "Thunderbird" is correctly installed and reachable. If so 
then "which tracker-extract "above, shows as NOT  correctly installed?
If so then the four Tracker executables above may not be correctly 
installed  since there is no link for them between the  files in 
/usr/lib/ and /usr/bin/ as there is for Thunderbird. There are 11 other 
tracker executables in my /usr/bin/ including the Tracker GUI 
"tracker-search-tool" Are my assumptions correct or am i barking up the 
wrong tree? :-P
Cheers JohnB O:-)