[drbits]

You can set an infinite time-out for Captchas. But, this means that other notifications will also not be displayed: other Captchas, warnings, and so on.

The Captcha does time out at the server end, sometimes in less than 2 minutes (which is not consistent with normal web design). When a Captcha display times out, it should be removed from the screen so that other notifications can be displayed. Missing a Captcha is not supposed to be an error, but queue a connection attempt for the next file from that host. That way, it does not lock out a whole host (for example, many Hotfile downloads do not need a Captcha, it depends on the file size).

The Captcha is not related to the notification area. That just happens to be the default location when JDownloader is minimized (most programs are inconsiderate enough to display it in the middle of the screen). It is a child window of JDownloader, and therefore the normal Open Window sound should work with it. Just make it a loud sound (most .wav files are recorded at a low volume).