diff --git a/core_pe/cache.py b/core_pe/cache.py
index e7f97cc7..db95fb0c 100644
--- a/core_pe/cache.py
+++ b/core_pe/cache.py
@@ -81,9 +81,9 @@ class Cache(object):
         try:
             self.con.execute(sql, [value, key])
         except sqlite.OperationalError:
-            logging.warning('Picture cache could not set %r for key %r', value, key)
+            logging.warning('Picture cache could not set value for key %r', key)
         except sqlite.DatabaseError as e:
-            logging.warning('DatabaseError while setting %r for key %r: %s', value, key, str(e))
+            logging.warning('DatabaseError while setting value for key %r: %s', key, str(e))
     
     def _create_con(self, second_try=False):
         def create_tables():
diff --git a/core_pe/matchbase.py b/core_pe/matchbase.py
index 87eb43b2..e3e5534e 100644
--- a/core_pe/matchbase.py
+++ b/core_pe/matchbase.py
@@ -34,8 +34,9 @@ def prepare_pictures(pictures, cache_path, j=job.nulljob):
     prepared = [] # only pictures for which there was no error getting blocks
     try:
         for picture in j.iter_with_progress(pictures, tr("Analyzed %d/%d pictures")):
-            picture.dimensions
             picture.unicode_path = str(picture.path)
+            logging.debug("Analyzing picture at {}".format(picture.unicode_path))
+            picture.dimensions # pre-read dimensions
             try:
                 if picture.unicode_path not in cache:
                     blocks = picture.get_blocks(BLOCK_COUNT_PER_SIDE)