Ever have a situation where using the same exact URLConnection code actually results in two different request headers? Check this out:

			

			POST / HTTP/1.1
			

			Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
			

			Accept-Language: en-us
			

			Accept-Encoding: gzip, deflate
			

			User-Agent:  Java1.3.0_01
			

			Host:  10.0.0.4
			

			Content-length:  25
			

			Content-Type:  application/x-www-form-urlencoded
			

			Content-Length: 25
			

		

			

			POST / HTTP/1.1
			

			User-Agent: Java1.3.0_02
			

			Host: 10.0.0.4
			

			Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
			

			Connection: keep-alive
			

			Content-type: application/x-www-form-urlencoded
			

			Content-length: 25
			

		

What's *that* all about? Here is the code used in both situations:

			

			URL url = new URL( "http://10.0.0.4" );
			

			URLConnection conn = url.openConnection();
			

			conn.setDoOutput( true );
			

			conn.setDoInput( true );
			

			OutputStream out = conn.getOutputStream();
			

			out.write( postQuery.getBytes() );
			

			out.flush();
			

			conn.getInputStream();