diff --git a/calibre-plugin/plugin-defaults.ini b/calibre-plugin/plugin-defaults.ini
index 668bc055..66891775 100644
--- a/calibre-plugin/plugin-defaults.ini
+++ b/calibre-plugin/plugin-defaults.ini
@@ -337,11 +337,13 @@ keep_summary_html:true
 ## Some attributes cause problems for EBook readers.  By default,
 ## FanFicFare will remove all attributes except the ones specified
 ## from all tags.  (The only exception is that <img> tags will also
-## keep src, alt and longdesc attributes.)
+## keep src, alt and longdesc attributes.  data-orighref is used by
+## internalize_text_links to preserve links when chapters are
+## inserted.)
 ## Example: To add 'style', 'title' and 'align' to the list to keep,
 ## in your personal.ini [defaults] put:
 ## add_to_keep_html_attrs:,style,title,align
-keep_html_attrs:href,name,class,id,colspan,rowspan
+keep_html_attrs:href,name,class,id,colspan,rowspan,data-orighref
 
 ## Tags listed here will be replaced with <span class="tagname">.
 ## For example: <u>underlined text</u> becomes
diff --git a/fanficfare/adapters/base_adapter.py b/fanficfare/adapters/base_adapter.py
index 73969478..3310ebff 100644
--- a/fanficfare/adapters/base_adapter.py
+++ b/fanficfare/adapters/base_adapter.py
@@ -451,7 +451,7 @@ class BaseSiteAdapter(Configurable):
         if not fetch:
             fetch=self._fetchUrlRaw
 
-        acceptable_attributes = self.getConfigList('keep_html_attrs',['href','name','class','id'])
+        acceptable_attributes = self.getConfigList('keep_html_attrs',['href','name','class','id','data-orighref'])
 
         if self.getConfig("keep_style_attr"):
             acceptable_attributes.append('style')
diff --git a/fanficfare/defaults.ini b/fanficfare/defaults.ini
index 5dffb2c9..47364b9b 100644
--- a/fanficfare/defaults.ini
+++ b/fanficfare/defaults.ini
@@ -340,11 +340,13 @@ keep_summary_html:true
 ## Some attributes cause problems for EBook readers.  By default,
 ## FanFicFare will remove all attributes except the ones specified
 ## from all tags.  (The only exception is that <img> tags will also
-## keep src, alt and longdesc attributes.)
+## keep src, alt and longdesc attributes.  data-orighref is used by
+## internalize_text_links to preserve links when chapters are
+## inserted.)
 ## Example: To add 'style', 'title' and 'align' to the list to keep,
 ## in your personal.ini [defaults] put:
 ## add_to_keep_html_attrs:,style,title,align
-keep_html_attrs:href,name,class,id,colspan,rowspan
+keep_html_attrs:href,name,class,id,colspan,rowspan,data-orighref
 
 ## Tags listed here will be replaced with <span class="tagname">.
 ## For example: <u>underlined text</u> becomes
diff --git a/fanficfare/writers/writer_epub.py b/fanficfare/writers/writer_epub.py
index 2046cd1c..1b740fb6 100644
--- a/fanficfare/writers/writer_epub.py
+++ b/fanficfare/writers/writer_epub.py
@@ -700,14 +700,27 @@ div { margin: 0pt; padding: 0pt; }
             CHAPTER_END = self.EPUB_CHAPTER_END
 
         for index, chap in enumerate(self.story.getChapters()): # (url,title,html)
+            logger.debug("chapter:%s %s %s"%(len(chap['html']), chap['title'],chap['url']))
             if chap['html']:
                 chap_data = chap['html']
                 if self.getConfig('internalize_text_links'):
                     soup = bs4.BeautifulSoup(chap['html'],'html5lib')
                     changed=False
                     for alink in soup.find_all('a'):
-                        if alink.has_attr('href') and alink['href'] in chapurlmap:
+                        ## Chapters can be inserted in the middle
+                        ## which can break existing internal links.
+                        ## So let's save the original href and update.
+                        logger.debug("found %s"%alink)
+                        if alink.has_attr('data-orighref') and alink['data-orighref'] in chapurlmap:
+                            alink['href']=chapurlmap[alink['data-orighref']]
+                            logger.debug("set1  %s"%alink)
+                            changed=True
+                        elif alink.has_attr('href') and alink['href'] in chapurlmap:
+                            if not alink['href'].startswith('file'):
+                                # only save orig href if not already internal.
+                                alink['data-orighref']=alink['href']
                             alink['href']=chapurlmap[alink['href']]
+                            logger.debug("set2  %s"%alink)
                             changed=True
                     if changed:
                         chap_data = unicode(soup)
@@ -734,6 +747,7 @@ div { margin: 0pt; padding: 0pt; }
                 # (200k+)
                 fullhtml = re.sub(r'(</p>|<br ?/>)\n*',r'\1\n',fullhtml)
 
+                logger.debug("write OEBPS/file%s.xhtml"%chap['index04'])
                 outputepub.writestr("OEBPS/file%s.xhtml"%chap['index04'],fullhtml.encode('utf-8'))
                 del fullhtml
 
diff --git a/fanficfare/writers/writer_html.py b/fanficfare/writers/writer_html.py
index 04615394..54de45bd 100644
--- a/fanficfare/writers/writer_html.py
+++ b/fanficfare/writers/writer_html.py
@@ -146,6 +146,8 @@ ${output_css}
             if chap['html']:
                 chap_data = chap['html']
                 if self.getConfig('internalize_text_links'):
+                    # html doesn't need data-orighref because it
+                    # doesn't do updates.
                     soup = bs4.BeautifulSoup(chap['html'],'html5lib')
                     changed=False
                     for alink in soup.find_all('a'):