I'm running the official build posted on the main download page and let it pull updates when you post them. I assume that means I'm on the stable build.

Here's what I put in my first post..

EDIT - I forgot to add that I'm running JD version 0.9.581 - but this has been the case for the last year+ I've used JDownloader. SO, it's not a version related issue.
Also, I've seen this behavior on Ubuntu Linux (9.04/x86), Windows XP (32 bit) and Windows 7 (64 bit)