diff --git a/src/calibre/ebooks/chm/reader.py b/src/calibre/ebooks/chm/reader.py
index edef712bb4..bbb43af567 100644
--- a/src/calibre/ebooks/chm/reader.py
+++ b/src/calibre/ebooks/chm/reader.py
@@ -132,6 +132,9 @@ class CHMReader(CHMFile):
             lpath = os.path.join(output_dir, path)
             self._ensure_dir(lpath)
             data = self.GetFile(path)
+            if lpath.find(';') != -1:
+                # fix file names with ";<junk>" at the end, see _reformat()
+                lpath = lpath.split(';')[0]
             with open(lpath, 'wb') as f:
                 if guess_mimetype(path)[0] == ('text/html'):
                     data = self._reformat(data)
@@ -158,14 +161,26 @@ class CHMReader(CHMFile):
         # cos they really fuck with the flow of things and generally waste space
         # since we can't use [a,b] syntax to select arbitrary items from a list
         # we'll have to do this manually...
+        # only remove the tables, if they have an image with an alt attribute
+        # containing prev, next or team
         t = soup('table')
         if t:
             if (t[0].previousSibling is None
               or t[0].previousSibling.previousSibling is None):
-                t[0].extract()
+                try:
+                    alt = t[0].img['alt'].lower()
+                    if alt.find('prev') != -1 or alt.find('next') != -1 or alt.find('team') != -1:
+                        t[0].extract()
+                except:
+                    pass
             if (t[-1].nextSibling is None
               or t[-1].nextSibling.nextSibling is None):
-                t[-1].extract()
+                try:
+                    alt = t[-1].img['alt'].lower()
+                    if alt.find('prev') != -1 or alt.find('next') != -1 or alt.find('team') != -1:
+                        t[-1].extract()
+                except:
+                    pass
         # for some very odd reason each page's content appears to be in a table
         # too. and this table has sub-tables for random asides... grr.
 
@@ -185,8 +200,24 @@ class CHMReader(CHMFile):
             except KeyError:
                 # and some don't even have a src= ?!
                 pass
-        # now give back some pretty html.
-        return soup.prettify('utf-8')
+        try:
+            # if there is only a single table with a single element
+            # in the body, replace it by the contents of this single element
+            tables = soup.body.findAll('table', recursive=False)
+            if tables and len(tables) == 1:
+                trs = tables[0].findAll('tr', recursive=False)
+                if trs and len(trs) == 1:
+                    tds = trs[0].findAll('td', recursive=False)
+                    if tds and len(tds) == 1:
+                        tdContents = tds[0].contents
+                        tableIdx = soup.body.contents.index(tables[0])
+                        tables[0].extract()
+                        while tdContents:
+                            soup.body.insert(tableIdx, tdContents.pop())
+        except:
+            pass
+        # do not prettify, it would reformat the <pre> tags!
+        return str(soup)
 
     def Contents(self):
         if self._contents is not None:
diff --git a/src/calibre/ebooks/txt/input.py b/src/calibre/ebooks/txt/input.py
index 7be1a3449a..a0570c07ae 100644
--- a/src/calibre/ebooks/txt/input.py
+++ b/src/calibre/ebooks/txt/input.py
@@ -8,7 +8,8 @@ import os
 
 from calibre.customize.conversion import InputFormatPlugin, OptionRecommendation
 from calibre.ebooks.txt.processor import convert_basic, convert_markdown, \
-    separate_paragraphs_single_line, separate_paragraphs_print_formatted
+    separate_paragraphs_single_line, separate_paragraphs_print_formatted, \
+    preserve_spaces
 
 class TXTInput(InputFormatPlugin):
 
@@ -28,6 +29,9 @@ class TXTInput(InputFormatPlugin):
                 'an indent (either a tab or 2+ spaces) represents a paragraph. '
                 'Paragraphs end when the next line that starts with an indent '
                 'is reached.')),
+        OptionRecommendation(name='preserve_spaces', recommended_value=False,
+            help=_('Normally extra spaces are condensed into a single space. '
+                'With this option all spaces will be displayed.')),
         OptionRecommendation(name='markdown', recommended_value=False,
             help=_('Run the text input through the markdown pre-processor. To '
                 'learn more about markdown see')+' http://daringfireball.net/projects/markdown/'),
@@ -48,6 +52,8 @@ class TXTInput(InputFormatPlugin):
             txt = separate_paragraphs_single_line(txt)
         if options.print_formatted_paras:
             txt = separate_paragraphs_print_formatted(txt)
+        if options.preserve_spaces:
+            txt = preserve_spaces(txt)
 
         if options.markdown:
             log.debug('Running text though markdown conversion...')
diff --git a/src/calibre/ebooks/txt/processor.py b/src/calibre/ebooks/txt/processor.py
index 06276a4bbc..baebf2f298 100644
--- a/src/calibre/ebooks/txt/processor.py
+++ b/src/calibre/ebooks/txt/processor.py
@@ -24,6 +24,9 @@ def convert_basic(txt, title=''):
     for line in txt.splitlines():
         lines.append(line.strip())
     txt = '\n'.join(lines)
+    
+    # Condense redundant spaces
+    txt = re.sub('[ ]{2,}', ' ', txt)
 
     # Remove blank lines from the beginning and end of the document.
     txt = re.sub('^\s+(?=.)', '', txt)
@@ -56,6 +59,11 @@ def separate_paragraphs_print_formatted(txt):
     txt = re.sub('(?miu)^(\t+|[ ]{2,})(?=.)', '\n\t', txt)
     return txt
 
+def preserve_spaces(txt):
+    txt = txt.replace(' ', '&nbsp;')
+    txt = txt.replace('\t', '&#09;')
+    return txt
+
 def opf_writer(path, opf_name, manifest, spine, mi):
     opf = OPFCreator(path, mi)
     opf.create_manifest(manifest)
diff --git a/src/calibre/gui2/convert/txt_input.py b/src/calibre/gui2/convert/txt_input.py
index 7fe6f6274c..f108bdd7d5 100644
--- a/src/calibre/gui2/convert/txt_input.py
+++ b/src/calibre/gui2/convert/txt_input.py
@@ -14,6 +14,7 @@ class PluginWidget(Widget, Ui_Form):
 
     def __init__(self, parent, get_option, get_help, db=None, book_id=None):
         Widget.__init__(self, parent, 'txt_input',
-            ['single_line_paras', 'print_formatted_paras', 'markdown', 'markdown_disable_toc'])
+            ['single_line_paras', 'print_formatted_paras', 'markdown',
+                'markdown_disable_toc', 'preserve_spaces'])
         self.db, self.book_id = db, book_id
         self.initialize_options(get_option, get_help, db, book_id)
diff --git a/src/calibre/gui2/convert/txt_input.ui b/src/calibre/gui2/convert/txt_input.ui
index 9fde157d33..5a9527ebc5 100644
--- a/src/calibre/gui2/convert/txt_input.ui
+++ b/src/calibre/gui2/convert/txt_input.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>400</width>
+    <width>470</width>
     <height>300</height>
    </rect>
   </property>
@@ -52,7 +52,7 @@
      </property>
     </widget>
    </item>
-   <item row="5" column="0">
+   <item row="6" column="0">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
@@ -65,10 +65,17 @@
      </property>
     </spacer>
    </item>
+   <item row="5" column="0">
+    <widget class="QCheckBox" name="opt_preserve_spaces">
+     <property name="text">
+      <string>Preserve &amp;spaces</string>
+     </property>
+    </widget>
+   </item>
   </layout>
  </widget>
  <resources/>
-<connections>
+ <connections>
   <connection>
    <sender>opt_markdown</sender>
    <signal>toggled(bool)</signal>