Bug??? Safari hogging audio during Multi-user switching

I have recently noticed that occasionally audio will stop working on my iMac .. volume up and down has no effect, no sound effect with volume increase, etc.
What I have found out is that my son had left Safari running on his desktop on pbssprout (lots of flash kiddie games and movies and such) .. when I switched to his account and quit out of Safari .. all audio was returned to normal (on his account and all others).
Has anyone else experienced anything similar?

Thanks Kirk & iBod for your quick attention to my question. I got rid of the older DivXDecoder file as noted and trashing the cookies.plist has Safari working smoothly again.
My copy of Safari resides in the user section because back when OSX was new to me I inadvertently "whacked" all the files in my shared Application folder. I'm still not sure how that happened but I will admit that while I was pretty savvy in the good old days of OS 6-9 there are basics of the OSX hierarchy that are still enigmatic to me.
I'm getting ready to upgrade to 10.4.11 with Safari 3 but first attending to cloning my current start-up drive. I'll probably do a clean install once I have that back-up as a safety. I have been following threads regarding the issues with Safari vs. 3rd party APE's, as well as trying to divine if there are any 10.4.11 issues with the HP B9180's PS2 ProPrint plug-in which I cannot afford to lose in my daily work.
Thanks again for your kind and accurate attention.
Best regards,
Pete

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Here are the steps to reproduce the security problem I'm seeing on my system:
1) Users A and B are logged in.
2) User A was the last user and user A put the system to sleep.
3) User B wakes the computer from sleep and sees the login prompt asking for user A's password.
4) Instead of clicking "Switch Users," user B enters his username into the username field (where user A's is already provided) and user B enters his password.
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Joseph Tate wrote:
Both are administrator accounts.
That's why.
This is a well known phenomenon. It isn't a bug. Admin users pretty much own the machine, they can do anything they want with their own admin password.
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When using the multi-user switching, the background image is distorted.
To recreate:
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Can you post screenshots of the distortion, someone may recognize it.
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No Audio when multi-camera monitor up

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Ever heard of Google? :p
FAQ:Why is there no audio during multi-camera editing?
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Hi,
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Audio output is squelched when fast user switching. Under Panther, audio playing in one user account would continue to play after fast user switching to another account. Under Tiger, the actual process continues, but the sound is muted.
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I really wish Apple would fix this.

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OK I have finally figured it out. Apparently the bug occurs if you "refix" the multicam. Example I was not happy with the selected camera went back and reedited it. Premiere then becomes a 62yo cafeteria lady, whom is 1 month away from being retired and a kid says he doesn't eat a certain food and she just fixed everything up and serves him.
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I really wish Apple would fix this.

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