Hi!
I have been using the Java firefly client for many months without problems on my MacBook on 10.5 although my Powerbook G4 had a strange issue: some kind of chopping noise made it impossible to hear any songs at all. The client reads the library correctly and ITunes could play the same shared music without problems.
Had the problem on the Powerbook only but now I am encountering the same issue on my MacBook.
Someone on the Sourceforge forum suggested to exchange the order of the JAVA versions to be used by any applications in the java preferences. Here is the link to the post on sourceforge:
http://sourceforge.net/forum/message.php?msg_id=7414887
That made me guess that an update of the JAVA somehow broke the client.
Is there any security issue connected with changing that order?