Hello! I'm using the beta (downloaded it a few days ago) and I have some questions and suggestions: 1, the bug. In XmlRpcClient.java, about line 290, you have the following statements: while (call != null) { call = dequeue(); executeAsync(call.request, call.callback, call.transport); } This throws a NullPointerException. I think the code must be as follows (dequeue and executeAsync exchanged): while (call != null) { executeAsync(call.request, call.callback, call.transport); call = dequeue(); } 2, the wish: Can you make the class ServerInputStream public? I want (or I have to) implement my own transport class, derived from LiteXmlRpcTransport, and I would like to use this class as well. 3, the suggestions: The reason for 2: In LiteXmlRpcTransport, you are creating a BufferedOutputStream with the default size of 512 bytes. That's pretty small, event the TCP layer can handle about 3 times this size. The disadvantage of this small buffersize is: When the call is larger than those 512 Bytes, first the header will be written and then the remaining data. But the sockets are blocking, so writing the header you will have to wait for the ACK from the server. But the server (or the underlying TCP stack) will wait for more data and only after a timeout (about 100ms or more) will send the ACK. The total cost of my call is about a few ms, but most of the time I had to wait for the ACK from the server! This is a significant performance hit! With the Beta you have a better class design, making it easier to overload and work around this buffer problem. But perhaps you could provide a way to set the buffer size from extern, or try to send the request in one call, making the buffer the size of the request plus header. 4, a question: The former version were very small, a jar file of about 50kB. Now, I need the codecs (a large jar file) and probably the httpclient (a huge jar file). I see the point of having just one code to implement the Base64 encoding / decoding. I don't see the point of having a multi-purpose-client, which can handle cookies, show frames, enlarge my penis size, ... *ooops* ;) I don't know, if I can use the xmlrpc jaf file without the codecs (I don't use Base64 at the moment) and without the http client. I compiled the sources without servelet and applet (removed it from the source) but I still need the codec. But then, it's not your code anymore, and this is the problem! I would like if you could split the code somehow, so one could use the small xmlrpc client alone and add codec and especially the http client only if needed, as an add-on. Kind regards Christoph