--- KavCalc.old/KavCalc.py
+++ KavCalc/KavCalc.py
@@ -65,15 +65,15 @@
 		# Get user input. Quit if user tries to quit. Wait for
 		# buttons clicked or hotkeys pressed.
 		for event in pygame.event.get ():
-			if event.type is QUIT:
+			if event.type == QUIT:
 				return
-			elif event.type is KEYDOWN and event.key is K_ESCAPE:
+			elif event.type == KEYDOWN and event.key == K_ESCAPE:
 				return
-			elif event.type is MOUSEBUTTONDOWN:
+			elif event.type == MOUSEBUTTONDOWN:
 				clicked = functions.buttons_clicked ( buttonGroup, pygame.mouse.get_pos () )
 				for b in clicked:
 					b.clicked ()
-			elif event.type is KEYDOWN:
+			elif event.type == KEYDOWN:
 #				print event.key, event.mod, event.unicode
 				keyed = functions.buttons_keyed ( buttonGroup, event.unicode, event.key )
 				for b in keyed: