From gnucash-devel, so that we don't forget about it:
https://lists.gnucash.org/pipermail/gnucash-devel/2006-January/015907.html

This is a very minor patch to the "fancy" (Technicolor) stylesheet.  It suppresses extraneous entries table entries in reports when there
are no files specified for the "logo pix" file or the "header pix" file.

Currently empty boxes appear if no files are selected for these entries.
Note: Patch works for both 1.8 series and gnome2 - stylesheets are identical code.


Index: src/report/stylesheets/stylesheet-fancy.scm
===================================================================
--- src/report/stylesheets/stylesheet-fancy.scm    (revision 12305)
+++ src/report/stylesheets/stylesheet-fancy.scm    (working copy)
@@ -289,16 +289,22 @@
        (gnc:html-markup-b
         (gnc:html-document-title doc)))))
     -      (gnc:html-table-set-cell!
-       t 0 0
-       (gnc:make-html-text
-    (gnc:html-markup-img logopixmap)))
+    (if (and logopixmap
+         (not (string=? logopixmap "")))
+          ;; check for logo image file name non blank
+      (gnc:html-table-set-cell!
+        t 0 0
+          (gnc:make-html-text
+       (gnc:html-markup-img logopixmap))) )
+;     +    (if (and headpixmap
+         (not (string=? headpixmap "")))
+          ;; check for header image file name nonblank
+      (gnc:html-table-set-cell!
+        t 0 1
+      (gnc:make-html-text
+       (gnc:html-markup-img headpixmap))) )
     -      (gnc:html-table-set-cell!
-       t 0 1
-       (gnc:make-html-text
-    (gnc:html-markup-img headpixmap)))
-           (apply
       gnc:html-table-set-cell!
       t 2 1
@@ -308,8 +314,7 @@
    ssdoc))

(gnc:define-html-style-sheet
- 'version 1
- 'name (N_ "Fancy")
+ 'version 1.01 'name (N_ "Fancy")
 'renderer fancy-renderer
 'options-generator fancy-options)