Safari 5.0 changes user agent to become mobile device agent on G5 10.5.8

Question

Safari 5.0 changes the default user agent on my two G5 Dual running on 10.5.8 deeply in the system , affecting ALL browsers in such a way that I can't access my CMS and my organization's website properly anymore. Each and every time it loads as 'default' user agent, but the 'default' user agent is now set to be some kind of mobile device.
I can check this since my organization has a script which detects which device you are accessing the site with and changes the layout accordingly. By setting the user agent to 'Safari 5.0' in Safari the page loads OK.
Worse is the fact that CMS works only with Firefox, and it's 'default' user agent is now also some kind of mobile device on my 2 different G5 Duals. This means that I can't access the CMS properly without manually go in and change the url. Doing a preview of a page in the CMS renders an error which can only be simulated by setting the user agent to 'default', both in Safari[5.0] and FF [3.6.3].
What happened here Apple?
see thread here: http://discussions.apple.com/message.jspa?messageID=11709335#11709335
Message was edited by: jarigo_

Answer 1

Hi and thanks.
Perhaps I'm not clear enough.
On my 2 PowerMac's, PPC, 2x2 Ghz, 10.5.8 and all latest patches and security updates using
Safari 5.0 and Firefox 3.6.3 an Opera there ARE the problems I have been trying to explain.
On the 2 PowerMac's, PPC, 2x2 Ghz, 10.5.8, ALL browsers pointing to:
http://unfccc.int
jumps to:
http://unfccc.int/home/5198.php , displaying the page as if it was an iPhone or a BlackBerry.
On my 2 MacBook Pro's, Intel, 10.6.4 and all latest patches and security updates using
Safari 5.0 and Firefox 3.6.3 there are NO problems.
On the 2 MacBook Pro's, Intel, 10.6.4, ALL browsers pointing to:
http://unfccc.int
jumps to:
http://unfccc.int/2860.php , which is correct and displays the page correctly
On my iMac, Intel, 10.5.8 and all latest patches and security updates using
Safari 5.0 and Firefox 3.6.3 there are NO problems.
On the iMac, Intel, 10.5.8, ALL browsers pointing to:
http://unfccc.int
jumps to:
http://unfccc.int/2860.php , which is correct and displays the page correctly
There has been no changes to the CMS. CMS recognize the browsers correctly on all above, EXCEPT the from the 2 PowerMac's, PPC, 2x2 Ghz, 10.5.8.
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