"describe" broken in 5.23.2



Dear list,

I've just downloaded Maxima 5.23.2 for Windows, and I've notice d that the
useful command "describe" is broken.
Here's what I get:

(%i1) describe(integrate);
WARNING: Empty documentation index. Describe command will not work!
  No exact match found for topic `integrate'.
  Try `?? integrate' (inexact match) instead.

(%o1)  false


I still have't tryed the linux version. This is a really annoying issue...
The command ?? is broken, too.

Stefano