diff --git a/src/common.rs b/src/common.rs
index 7750d9ea5..3ec02ad9b 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -35,7 +35,23 @@ macro_rules! xx {
 	}
 }
 
+#[macro_export]
+macro_rules! flush {
+	($($arg:tt)*) => ($crate::flush(format!("{}", format_args!($($arg)*))));
+}
+
+#[macro_export]
+macro_rules! flushln {
+	($fmt:expr) => (flush!(concat!($fmt, "\n")));
+	($fmt:expr, $($arg:tt)*) => (flush!(concat!($fmt, "\n"), $($arg)*));
+}
+
 pub fn flush(s: String) {
 	::std::io::stdout().write(s.as_bytes()).unwrap();
 	::std::io::stdout().flush().unwrap();
 }
+
+#[test]
+fn test_flush() {
+	flushln!("hello_world {:?}", 1);
+}
diff --git a/src/network/host.rs b/src/network/host.rs
index 8b1038c8a..99e8b5e7c 100644
--- a/src/network/host.rs
+++ b/src/network/host.rs
@@ -600,14 +600,12 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 			FIRST_CONNECTION ... LAST_CONNECTION => self.connection_timeout(token, io),
 			NODETABLE_DISCOVERY => {},
 			NODETABLE_MAINTAIN => {},
-			_ => {
-				let protocol = *self.timers.get_mut(&token).expect("Unknown user timer token");
-				match self.handlers.get_mut(protocol) {
-					None => { warn!(target: "net", "No handler found for protocol: {:?}", protocol) },
-					Some(h) => {
-						h.timeout(&mut NetworkContext::new(io, protocol, Some(token), &mut self.connections, &mut self.timers), token);
-					}
-				}
+			_ => match self.timers.get_mut(&token).map(|p| *p) {
+					Some(protocol) => match self.handlers.get_mut(protocol) {
+							None => { warn!(target: "net", "No handler found for protocol: {:?}", protocol) },
+							Some(h) => { h.timeout(&mut NetworkContext::new(io, protocol, Some(token), &mut self.connections, &mut self.timers), token); }
+					},
+					None => {} // time not registerd through us
 			}
 		}
 	}
diff --git a/src/rlp/rlpin.rs b/src/rlp/rlpin.rs
index 2179643d1..4cc83b261 100644
--- a/src/rlp/rlpin.rs
+++ b/src/rlp/rlpin.rs
@@ -1,3 +1,4 @@
+use std::fmt;
 use rlp::{View, Decodable, DecoderError, UntrustedRlp, PayloadInfo, Prototype};
 
 impl<'a> From<UntrustedRlp<'a>> for Rlp<'a> {
@@ -15,6 +16,12 @@ pub struct Rlp<'a> {
 	rlp: UntrustedRlp<'a>
 }
 
+impl<'a> fmt::Display for Rlp<'a> {
+	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+		write!(f, "{}", self.rlp)
+	}
+}
+
 impl<'a, 'view> View<'a, 'view> for Rlp<'a> where 'a: 'view {
 	type Prototype = Prototype;
 	type PayloadInfo = PayloadInfo;
diff --git a/src/rlp/untrusted_rlp.rs b/src/rlp/untrusted_rlp.rs
index c0e7c4cf7..2bf33ba68 100644
--- a/src/rlp/untrusted_rlp.rs
+++ b/src/rlp/untrusted_rlp.rs
@@ -1,4 +1,6 @@
 use std::cell::Cell;
+use std::fmt;
+use rustc_serialize::hex::ToHex;
 use bytes::{FromBytes};
 use rlp::{View, Decoder, Decodable, DecoderError};
 
@@ -63,6 +65,24 @@ impl<'a> Clone for UntrustedRlp<'a> {
 	}
 }
 
+impl<'a> fmt::Display for UntrustedRlp<'a> {
+	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+		match self.prototype() {
+			Ok(Prototype::Null) => write!(f, "null"),
+			Ok(Prototype::Data(_)) => write!(f, "\"0x{}\"", self.data().unwrap().to_hex()),
+			Ok(Prototype::List(len)) => {
+				try!(write!(f, "["));
+				for i in 0..len-1 {
+					try!(write!(f, "{}, ", self.at(i).unwrap()));
+				}
+				try!(write!(f, "{}", self.at(len - 1).unwrap()));
+				write!(f, "]")
+			},
+			Err(err) => write!(f, "{:?}", err)
+		}
+	}
+}
+
 impl<'a, 'view> View<'a, 'view> for UntrustedRlp<'a> where 'a: 'view {
 	type Prototype = Result<Prototype, DecoderError>;
 	type PayloadInfo = Result<PayloadInfo, DecoderError>;
@@ -410,3 +430,12 @@ impl_array_decodable_recursive!(
 	16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
 	32, 40, 48, 56, 64, 72, 96, 128, 160, 192, 224,
 );
+
+#[test]
+fn test_rlp_display() {
+	use rustc_serialize::hex::FromHex;
+	let data = "f84d0589010efbef67941f79b2a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a0c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470".from_hex().unwrap();
+	let rlp = UntrustedRlp::new(&data);
+	assert_eq!(format!("{}", rlp), "[\"0x05\", \"0x010efbef67941f79b2\", \"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421\", \"0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470\"]");
+}
+
diff --git a/src/uint.rs b/src/uint.rs
index ccc66b447..546965ca4 100644
--- a/src/uint.rs
+++ b/src/uint.rs
@@ -695,16 +695,30 @@ macro_rules! construct_uint {
 
 		impl fmt::Debug for $name {
 			fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-				let &$name(ref data) = self;
-				try!(write!(f, "0x"));
-				for ch in data.iter().rev() {
-					try!(write!(f, "{:02x}", ch));
-				}
-				Ok(())
+				fmt::Display::fmt(self, f)
 			}
 		}
 
 		impl fmt::Display for $name {
+			fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+				if *self == $name::zero() {
+					return write!(f, "0");
+				}
+
+				let mut s = String::new();
+				let mut current = *self;
+				let ten = $name::from(10);
+
+				while current != $name::zero() {
+					s = format!("{}{}", (current % ten).low_u32(), s);
+					current = current / ten;
+				}
+
+				write!(f, "{}", s)
+			}
+		}
+
+		impl fmt::LowerHex for $name {
 			fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 				let &$name(ref data) = self;
 				try!(write!(f, "0x"));
@@ -1222,5 +1236,16 @@ mod tests {
 		assert_eq!(U256::from_dec_str("10").unwrap(), U256::from(10u64));
 		assert_eq!(U256::from_dec_str("1024").unwrap(), U256::from(1024u64));
 	}
+
+	#[test]
+	fn display_uint() {
+		let s = "12345678987654321023456789";
+		assert_eq!(format!("{}", U256::from_dec_str(s).unwrap()), s);
+	}
+
+	#[test]
+	fn display_uint_zero() {
+		assert_eq!(format!("{}", U256::from(0)), "0");
+	}
 }