Index: plugins_base/Logger.py
===================================================================
--- plugins_base/Logger.py	(revision 1466)
+++ plugins_base/Logger.py	(working copy)
@@ -49,7 +49,7 @@
     or similar'''

     CREATE_USER = '''
-    CREATE TABLE user
+    CREATE TABLE IF NOT EXISTS user
     (
         id INTEGER PRIMARY KEY,
         account TEXT
@@ -57,7 +57,7 @@
     '''

     CREATE_CONVERSATION = '''
-    CREATE TABLE conversation
+    CREATE TABLE IF NOT EXISTS conversation
     (
         id INTEGER PRIMARY KEY,
         started INTEGER
@@ -65,7 +65,7 @@
     '''

     CREATE_EVENT = '''
-    CREATE TABLE event
+    CREATE TABLE IF NOT EXISTS event
     (
         id INTEGER PRIMARY KEY,
         stamp INTEGER,
@@ -74,7 +74,7 @@
     '''

     CREATE_USER_EVENT = '''
-    CREATE TABLE user_event
+    CREATE TABLE IF NOT EXISTS user_event
     (
         id_event INTEGER,
         id_user INTEGER,
@@ -83,7 +83,7 @@
     '''

     CREATE_CONVERSATION_EVENT = '''
-    CREATE TABLE conversation_event
+    CREATE TABLE IF NOT EXISTS conversation_event
     (
         id_event INTEGER,
         id_conversation INTEGER,
@@ -91,9 +91,9 @@
         data TEXT
  )
     '''
-    CREATE_USER_EVENT_INDEX_EVENT = 'CREATE INDEX ueidevent ON \
+    CREATE_USER_EVENT_INDEX_EVENT = 'CREATE INDEX IF NOT EXISTS ueidevent ON \
                                      user_event(id_event)'
-    CREATE_USER_EVENT_INDEX_USER = 'CREATE INDEX ueiduser ON \
+    CREATE_USER_EVENT_INDEX_USER = 'CREATE INDEX IF NOT EXISTS ueiduser ON \
                                     user_event(id_user)'

     USER_EXISTS = 'SELECT id FROM user WHERE account = ?'
@@ -111,9 +111,6 @@
     CONVERSATION_ADD = 'INSERT INTO conversation(id, started) \
                         VALUES(null, ?)'

-    CHECK_AVAIL_INDEX = 'CREATE INDEX IF NOT EXISTS ueiduser \
-                         ON user_event(id_user);'
-
     def __init__(self, path):
         '''constructor, try to open the database at path, if can not open
         it, then try to create it'''
@@ -138,7 +135,6 @@
         self.cursor.execute(Logger.CREATE_CONVERSATION)
         self.cursor.execute(Logger.CREATE_EVENT)
         self.cursor.execute(Logger.CREATE_USER_EVENT)
-        self.cursor.execute(Logger.CHECK_AVAIL_INDEX)
         self.cursor.execute(Logger.CREATE_USER_EVENT_INDEX_EVENT)
         self.cursor.execute(Logger.CREATE_USER_EVENT_INDEX_USER)
         self.cursor.execute(Logger.CREATE_CONVERSATION_EVENT)