--- Google Reader copy/GRController.m	2007-03-11 18:45:56.000000000 +0800
+++ Google Reader/GRController.m	2007-03-11 18:49:46.000000000 +0800
@@ -1610,7 +1610,15 @@
 
 	if ([[prefs valueForKey:@"dontVerifySubscription"] boolValue] != YES) {
 
-		[[NSWorkspace sharedWorkspace] openURL:[NSURL URLWithString:[[NSString stringWithFormat:@"%@://www.google.com/reader/preview/*/feed/", [self getURLPrefix]] stringByAppendingString:url]]];			
+		NSMutableString * escapedUrl = [NSMutableString stringWithCapacity:([url length]*3)];	// for the worst case the length will growth to 3 times
+		[escapedUrl setString:url];
+		[escapedUrl replaceOccurrencesOfString:@"?" withString:@"%3F" options:0 range:NSMakeRange(0, [escapedUrl length])];
+		[escapedUrl replaceOccurrencesOfString:@"&" withString:@"%26" options:0 range:NSMakeRange(0, [escapedUrl length])];
+		[escapedUrl replaceOccurrencesOfString:@":" withString:@"%3A" options:0 range:NSMakeRange(0, [escapedUrl length])];
+		[escapedUrl replaceOccurrencesOfString:@"/" withString:@"%2F" options:0 range:NSMakeRange(0, [escapedUrl length])];
+		[escapedUrl replaceOccurrencesOfString:@"=" withString:@"%3D" options:0 range:NSMakeRange(0, [escapedUrl length])];
+
+		[[NSWorkspace sharedWorkspace] openURL:[NSURL URLWithString:[[NSString stringWithFormat:@"%@://www.google.com/reader/preview/*/feed/", [self getURLPrefix]] stringByAppendingString:escapedUrl]]];			
 			
 	} else {