Grooveshark is an online music service, very well-known and common especially in Europe. The quality of its mp3, offered just for listening is higher than what you find on YouTube and some programs were developed to allow listeners to search and listen songs without visiting the Grooveshark website. Some of these software let you save sample of songs for a later listening but this habit doesn’t complain with the copyright laws in many countries so we discourage this kind of practice.
This developer, using wireshark, was able to identify the misconfiguration between GrooveDown and the Grooveshark’s server and to positively update the data (client version and password) exchanged.
More in general I think that GrooveDown is the best client to listen to Grooveshark also because it is more powerful, fast and easy to use than its competitors. In particular, during some tests I did, I was positively impressed by the results I obtained using GrooveDown because I received better and more complete search results than using, for example, GrooveOff which is too a good software but, for my personal experience, gave back less impressive results.
Last but not least I want to underline that the caleta.fm development of GrooveDown is really stable and it was developed in two different versions just to be used with Java6 or Java7 platform. Recommended!