Web File Manager Installation bug - missing webfm_file database table
The discussion http://drupal.org/node/716544#comment-2877320 details the problem and even goes over some solutions.
It seems that by version 6.x-2.12 the previous error is fixed, but a new one is introduced.
The line is 'fdesc' => array('type' => 'text', 'not null' => TRUE)
and so the problem is not the declaration of a null default, but rather the missing 'size' value
Replaced with
'fdesc' => array('type' => 'text', 'size' => 'normal', 'not null' => TRUE)
as explained in the earlier posts of the forum-topoic above and I was able to install and use the module as explained.

Once I use it for some time, I will be able to know if it is as stable as we would all want it to be.
Implications when considering the Drupal-7 upgrade path
I am a little worried that there does not seem to eb a Drupal-7 version of this module in the works. Since role that this module plays is essential and one cannot migrate to Dr7 and disabled it in the process (without looking attachment amanagement features - especially if using the WebFM attachment field in place of the classic "attachment" or Filefield CCK field), it is concerning that heavy use cold mean that one has to delay Drupal-7 implementation/migration


