Disable HTMLMIN with Python 2.6 as it doesn't work on that older version.

web/config.py

@@ -172,6 +172,8 @@ SECURITY_PASSWORD_HASH = 'pbkdf2_sha512'
 #       configuration databases 'keys' table and are auto-generated.
 
 # Should HTML be minified on the fly when not in debug mode?
+# NOTE: The HTMLMIN module doesn't work with Python 2.6, so this option
+#       has no effect on <= Python 2.7.
 MINIFY_PAGE = True
 
 ##########################################################################

web/pgadmin/__init__.py

@@ -450,7 +450,8 @@ def create_app(app_name=None):
     ##########################################################################
     # Minify output
     ##########################################################################
-    if not config.DEBUG:
+    # HTMLMIN doesn't work with Python 2.6.
+    if not config.DEBUG and sys.version_info >= (2,7):
         HTMLMIN(app)
 
     @app.context_processor