diff --git a/PBWebController.m b/PBWebController.m
index 0548b08..b9d472d 100644
--- a/PBWebController.m
+++ b/PBWebController.m
@@ -54,7 +54,7 @@
 
 # pragma mark Delegate methods
 
-- (void)webView:(WebView *)sender didStartProvisionalLoadForFrame:(WebFrame *)frame
+- (void)webView:(WebView *)sender didClearWindowObject:(WebScriptObject *)windowObject forFrame:(WebFrame *)frame
 {
 	id script = [view windowScriptObject];
 	[script setValue: self forKey:@"Controller"];
diff --git a/PBWebHistoryController.m b/PBWebHistoryController.m
index 68fece7..616655c 100644
--- a/PBWebHistoryController.m
+++ b/PBWebHistoryController.m
@@ -22,6 +22,7 @@
 
 - (void) didLoad
 {
+	currentSha = @"";
 	[self changeContentTo: historyController.webCommit];
 }