Readme notes for In-link 3.1.3
Intechnic Corporation, December 23, 2005

This release has been solely focused on integrating In-portal with mod_rewrite.
The integration allows In-portal to generate and parse meaningful,
friendly URLs with no query string. Please consult the product manual
section 4.2.12.	"URLs Structure & Mod_Rewrite" for more information.
A number of bug-fixes have also been included in this release.

IMPORTANT:
Upgrade Notes

After upgrading to this version, please open Administrative Console,
Structure & Data -> Catalog section and click
the 'Rebuild Category Cache' button (an icon with a folder and blue arrows between Approve and Cut icons).
Then go to Configuration -> Themes and click 'Rescan Themes' button (the last one in the toolbar).
These operations are critical before enabling mod_rewrite functionality.