Strange issue with Safari - Quicktime video playing - on Mac OSX Lion (All updates done till 20th Nov 2011 night)
Problem discovery: Tried to view the
Apple iPhone 4S Keynote on Apple Website. Strange that Safari does not display any videos from Apple Website.
Strange Discovery:
System:
Please help with a solution if anyone has faced and solved this problem. Sub question is : If DIVX / anyother plug-in causes problems with QuickTime plugin on Safari, why does it affect only one user on the system and not other users on that system ?
Notes:
1) There is a similar looking thread on MacRumors here but concluded that required to start a seperate one with clear problem statement.
2) Apple Forums
(a) One thread on topic that hints that some 3IVX plug-in can cause issues with Safari Quicktime Plugin:
here
(b) Another thread from Apple Forum, that hints that DIVX causes problems to Safari Quicktime Plug in, Link is
Here
Problem discovery: Tried to view the

Following works OK:- You Tube worked fine.
- Google Chrome worked fine. (It shows the quick time player loading and then displays the video absolutely fine.)
- Google Chrome worked fine. (It shows the quick time player loading and then displays the video absolutely fine.)
Conclusion: There is some problem with Safari Quicktime Plug-in.
Strange Discovery:
- - There are two users on the MAC. Logged in with a general user (Non Admin)
- - When tried to view Apple Videos on Safary ... THEY WORKED FINE !!!
- - The user where they donot work is an ADMIN User ... Strange !!!
System:
- - Mac-Mini 2010 - 8 GB RAM - with OSX Lion fully software updated until 20th Nov 2011 night.
- - DIVX is installed and is also a paid version - registered with DIVX website.
- - VLC is installed.
- - Perian was installed - after problem discovery - uninstalled it - no use.
Please help with a solution if anyone has faced and solved this problem. Sub question is : If DIVX / anyother plug-in causes problems with QuickTime plugin on Safari, why does it affect only one user on the system and not other users on that system ?
Notes:
1) There is a similar looking thread on MacRumors here but concluded that required to start a seperate one with clear problem statement.
2) Apple Forums
(a) One thread on topic that hints that some 3IVX plug-in can cause issues with Safari Quicktime Plugin:

(b) Another thread from Apple Forum, that hints that DIVX causes problems to Safari Quicktime Plug in, Link is
