diff --git a/core/admin.py b/core/admin.py
index 962c6736..af3962eb 100644
--- a/core/admin.py
+++ b/core/admin.py
@@ -225,8 +225,8 @@ class EbookFileAdmin(ModelAdmin):
     list_display = ('created', 'format', 'ebook_link', 'asking')
     date_hierarchy = 'created'
     ordering = ('edition__work',)
-    fields = ('file', 'format', 'edition', 'edition_link', 'ebook', 'ebook_link', 'source')
-    readonly_fields = ('file', 'edition_link', 'ebook_link',)
+    fields = ('file', 'format', 'edition', 'edition_link', 'ebook', 'ebook_link', 'source', 'mobied')
+    readonly_fields = ('file', 'edition_link', 'ebook_link', 'source')
     def edition_link(self, obj):
         if obj.edition:
             link = reverse("admin:core_edition_change", args=[obj.edition_id])
diff --git a/core/loaders/__init__.py b/core/loaders/__init__.py
index e47ca29b..c43ed6e7 100755
--- a/core/loaders/__init__.py
+++ b/core/loaders/__init__.py
@@ -55,6 +55,7 @@ def add_by_sitemap(url, maxnum=None):
     
 def scrape_language(url):
     scraper = get_scraper(url)
-    return scraper.metadata.get('language')
+    language = scraper.metadata.get('language')
+    return language if language else 'xx'
 
 
diff --git a/core/loaders/harvest.py b/core/loaders/harvest.py
index f4a72a59..ff68c90d 100644
--- a/core/loaders/harvest.py
+++ b/core/loaders/harvest.py
@@ -158,8 +158,14 @@ def make_harvested_ebook(content, ebook, format, filesize=0):
         format=format,
         source=ebook.url,
     )
-    new_ebf.file.save(path_for_file(new_ebf, None), ContentFile(content))
-    new_ebf.save()
+    try:
+        new_ebf.file.save(path_for_file(new_ebf, None), ContentFile(content))
+        new_ebf.save()
+    except MemoryError:  #huge pdf files cause problems here
+        logger.error("memory error saving ebook file for %s", ebook.url)
+        new_ebf.delete()
+        return None, False
+
     new_ebook = Ebook.objects.create(
         edition=ebook.edition,
         format=format,
diff --git a/core/management/commands/harvest_online_ebooks.py b/core/management/commands/harvest_online_ebooks.py
index bc6a8c91..cfa941b9 100644
--- a/core/management/commands/harvest_online_ebooks.py
+++ b/core/management/commands/harvest_online_ebooks.py
@@ -20,8 +20,8 @@ class Command(BaseCommand):
             if new_ebf and new:
                 done += 1
                 self.stdout.write(unicode(new_ebf.edition.work.title))
-                if done == limit or done == 50:
+                if done == limit or done == 100:
                     break
         self.stdout.write('harvested {} ebooks'.format(done))
-        if done == 50:
-            self.stdout.write('50 is the maximum; repeat to do more')
+        if done == 100:
+            self.stdout.write('100 is the maximum; repeat to do more')
diff --git a/requirements_versioned.pip b/requirements_versioned.pip
index e9427c70..a53afd75 100644
--- a/requirements_versioned.pip
+++ b/requirements_versioned.pip
@@ -5,7 +5,8 @@ Jinja2>=2.7
 MySQL-python==1.2.5
 Pillow==3.4.2
 PyJWT==1.4.1
-PyPDF2==1.26
+#PyPDF2==1.26
+git+git://github.com/mstamy2/PyPDF2.git@18a2627adac13124d4122c8b92aaa863ccfb8c29
 PyGithub==1.15.0
 PyYAML==3.13
 amqp==1.4.9