Mysterious audio file caching

I wrote a "play .WAV file" function (using getAudioClip) as part of my applet and am using it as a subroutine in my Javascript/PHP web application. The application records the user's voice, saves it on a server, and plays it back when requested. The mystery is this:
My Apache server is NOT configured to cache files. I turned off Java's caching function via Java's control panel. In spite of this, when I overwrite an audio file with new content, the application keeps playing the old content for a while. (It seems that content sticks for about 10 minutes.) I tried emptying the browser cache right after new content is recorded, but the result is the same. The old content is kept SOMEWHERE and I don't know where. It's not in Java's cache directory. It's not in the browser cache.
Can anyone shed some light on it?
Edited by: acchan on Aug 1, 2009 8:33 AM

acchan wrote:
Can anyone shed some light on it?Applets can be horrid for caching. Suggestions..
1) Check the information returned from the URL actually changes (in length/data).
2) Create a javax.sound.sampled.Clip instead of the AudioClip.
Here is some [source demonstrating the second part|http://forums.sun.com/thread.jspa?messageID=10780561#10780561].

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