diff --git a/twander.1 b/twander.1
index d2ead99..7a3fbeb 100644
--- a/twander.1
+++ b/twander.1
@@ -3657,7 +3657,7 @@
 .nf
    ASSOC .pdf   mypdfreader          [SELECTION]
    ASSOC .ps    mypostscriptprogram  [SELECTION]
-   ASSOC  *     myfineeditor [SELECTION]
+   ASSOC  *     myfineeditor         [SELECTION]
 .fi
 .ft \" revert
 
@@ -3665,6 +3665,76 @@
 not ending in either ".pdf" or ".ps", the default association action
 will be taken:  The file will be opened with \fCmyfineeditor\fP.
 
+You can also define a list of file types to be 
+.B excluded
+from association processing.  This is handy if you want to use the
+default association feature for everything except a particular set
+of file types.  This feature is primarily useful on Windows systems
+where you want to define your own default action, but want a few
+particular types of files to use the underlying Windows associations.
+
+To do this, put one or more statements in the following form in your
+Configuration File:
+
+.ft C \" courier
+.nf
+   ASSOC - space-separated-list-of-file-types
+.fi
+.ft \" revert
+
+
+For example: 
+
+.ft C \" courier
+.nf
+   ASSOC  *     myfineeditor [SELECTION]
+   ASSOC  -     .txt .pyo .ps
+.fi
+.ft \" revert
+
+With this configuration, all files would, by default, be handled
+with \fCmyfineeditor\fP
+.B except
+files whose names end with \fC.txt\fP, \fC.pyo\fP, or .\fCps\fP.
+These excluded file types would be handed to the underlying OS
+for "execution".
+
+Note that exclusion has higher precedence than any explicit
+association, not just the default association.  If you do this:
+
+.ft C \" courier
+.nf
+   ASSOC .pdf   mypdfreader [SELECTION]
+   ASSOC -      .pdf
+.fi
+.ft \" revert
+
+You are effectively masking the explicit association for \fC.pdf\fP
+files.
+
+You can also remove a previously defined association by leaving
+the right-hand-side of the \fCASSOC\fP statement blank:
+
+.ft C \" courier
+.nf
+   # This example first defines, and then removes an association
+   # for .pdf files:
+
+   ASSOC .pdf   mypdfreader [SELECTION]
+   ASSOC .pdf
+.fi
+.ft \" revert
+
+
+This feature is primarily useful when you want to define associations
+conditionally.  That is, you can remove an association if a particular
+conditional block is true.  A typical use for this might be to
+get different (or remove) associations based on what OS you're 
+running.  (See the section below entitled:
+.B Conditional Processing Statements
+).
+
+
 
 .SS A Few Association Subtleties
 
@@ -5065,4 +5135,4 @@
 .ft \" revert
 
 .SH DOCUMENT REVISION INFORMATION
-$Id: twander.1,v 1.139 2006/12/18 22:26:22 tundra Exp $
\ No newline at end of file
+$Id: twander.1,v 1.140 2006/12/19 00:22:59 tundra Exp $
\ No newline at end of file