--- chm2pdf	2011-11-20 17:46:26.000000000 +0100
+++ chm2pdf_images_case_insensitive	2011-11-20 20:03:20.000000000 +0100
@@ -153,8 +153,9 @@
                 if ';' in img_filename: #hack to get rid of mysterious ; in filenames and urls...
                     img_filename=img_filename.split(';')[0]
         # substitute the new image filenames - but only if an img_filename was found!
+        # added (?i) modifier to make a case insensitive match for not breaking working links to images in windows in CHM files 
         if img_filename:
-            page=re.sub(iurl,img_filename,page)
+            page=re.sub('(?i)"'+iurl,'"'+img_filename,page)
             
 
     # We substitute the CSS URLs of input_file with the *actual* URLs on the CHM2PDF_ORIG_DIR directory