Recently, the gnome-search-tool was redesigned.  The goal being to make it
more HIG compliant.  These changes are documented in bug reports  #81821, 
#90774,  #83444, and #84723.  The following summarizes the changes made to
the interface.

1.  The menu bar has been removed.
2.  The [Simple] and [Advanced] tabs have been removed.
3.  The [Show Command] feature has been removed.
4.  [Help], [Close], and [Find] buttons have been added.
5.  A right click popup menu for search results has been added.  
    The popup menu contains [Open...], [Open Folder...], 
    and [Save Results As...] menu items.   
6.  A disclosure widget for [Additional Constraints] has been added.
7.  The [Process folder contents depth first] rule has been removed.
8.  The [Last time modified] constraint has been removed.
9.  Two new constraints [Date modified before (days)] and 
[Date modified after (days)] have been added.
	Two new constraints [Size is less than (kilobytes)] and [Size is more than
(kilobytes)] have been added.

The available constraint names are:
Contains the text
Owned by user
Owned by group
Owner is unrecognized
Date modified before (days)
Date modified after (days)
Size is less than (kilobytes)
Size is more than (kilobytes)
File is empty
File is not named
File matches regular expression
Follow symbolic links
Search only this filesystem