diff --git a/src/calibre/gui2/store/gutenberg_plugin.py b/src/calibre/gui2/store/gutenberg_plugin.py
index 8d04b6236d..8166185ff5 100644
--- a/src/calibre/gui2/store/gutenberg_plugin.py
+++ b/src/calibre/gui2/store/gutenberg_plugin.py
@@ -79,5 +79,6 @@ class GutenbergStore(BasicStoreConfig, StorePlugin):
                 s.author = author.strip()
                 s.price = price.strip()
                 s.detail_item = '/ebooks/' + id.strip()
+                s.drm = False
                 
                 yield s
diff --git a/src/calibre/gui2/store/mobileread_plugin.py b/src/calibre/gui2/store/mobileread_plugin.py
index 49c265d7fe..d520b42fae 100644
--- a/src/calibre/gui2/store/mobileread_plugin.py
+++ b/src/calibre/gui2/store/mobileread_plugin.py
@@ -129,8 +129,6 @@ class BookRef(SearchResult):
     
     def __init__(self):
         SearchResult.__init__(self)
-        
-        self.format = ''
 
 
 class MobeReadStoreDialog(QDialog, Ui_Dialog):
diff --git a/src/calibre/gui2/store/search.py b/src/calibre/gui2/store/search.py
index ce8296ba7e..c94c43537f 100644
--- a/src/calibre/gui2/store/search.py
+++ b/src/calibre/gui2/store/search.py
@@ -38,6 +38,7 @@ def comparable_price(text):
         text += '00'
     text = re.sub(r'\D', '', text)
     text = text.rjust(6, '0')
+    return text
 
 
 class SearchDialog(QDialog, Ui_Dialog):
@@ -314,6 +315,13 @@ class SearchThread(Thread):
             
     def _clean_query(self, query):
         query = query.lower()
+        # Remove control modifiers.
+        query = query.replace('\\', '')
+        query = query.replace('!', '')
+        query = query.replace('=', '')
+        query = query.replace('~', '')
+        query = query.replace('>', '')
+        query = query.replace('<', '')
         # Remove the prefix.
         for loc in ( 'all', 'author', 'authors', 'title'):
             query = re.sub(r'%s:"?(?P<a>[^\s"]+)"?' % loc, '\g<a>', query)
@@ -321,14 +329,8 @@ class SearchThread(Thread):
         for loc in ('cover', 'drm', 'format', 'formats', 'price', 'store'):
             query = re.sub(r'%s:"[^"]"' % loc, '', query)
             query = re.sub(r'%s:[^\s]*' % loc, '', query)
-        # Remove control modifiers.
+        # Remove logic.
         query = re.sub(r'(^|\s)(and|not|or)(\s|$)', ' ', query)
-        query = query.replace('\\', '')
-        query = query.replace('!', '')
-        query = query.replace('=', '')
-        query = query.replace('~', '')
-        query = query.replace('>', '')
-        query = query.replace('<', '')
         # Remove excess whitespace.
         query = re.sub(r'\s{2,}', ' ', query)
         return query
diff --git a/src/calibre/gui2/store/search_result.py b/src/calibre/gui2/store/search_result.py
index 6e0ed0b572..25ff32d0ec 100644
--- a/src/calibre/gui2/store/search_result.py
+++ b/src/calibre/gui2/store/search_result.py
@@ -16,3 +16,8 @@ class SearchResult(object):
         self.author = ''
         self.price = ''
         self.detail_item = ''
+        # None = Unknown.
+        # True = Has DRM.
+        # False = Does not have DRM.
+        self.drm = None
+        self.formats = ''