Here's a fix for Safari hanging and taking down the system..

There appears to be a serious bug in Mac OS X's lookupd which can pull the rug right out from under Mac OS X Tiger. While this bug could possibly be triggered in a number of different ways, there has been a recent rash of reports that have been tracked to some mainstream Web sites such as FoxNews.com using links to an adware site js.adsonar.com. This document describes a quick way out of the hang and a simple way to block links to js.adsonar.com from taking down Tiger again. While this doesn't fix the underlying lookupd bug itself, it prevents Mac OS X from hanging, while allowing you to continue using Web sites like FoxNews.com with full Java and JavaScript access enabled.
The symptoms of this problem are as follows:
• You're surfing the web and the page you are on fails to completely load.
• No further pages will load in your browser.
• You can switch to other applications that may already be running and save any open files.
• You can no longer launch any additional applications, their icons will bounce in the dock for a while and then they will just stop bouncing.
• You can no longer use any other Finder functions.
• You can no longer use command-option-escape to force quit.
• You can not log out, restart or shut down.
Apparently these symptoms indicate that a low-level component of Mac OS X, lookupd, has hung. Since lookupd is used by many other parts of Mac OS X, it effectively hangs Mac OS X itself.
If this sounds like a problem you are having, try the steps in the following link to fix it.
Mac OS X Tiger lookupd bug & adsonar fix
Hope it helps,
-MikeS
Disclaimer:
[The above link goes to a bug fix on DreamLight.com, my commercial website. While neither I nor DreamLight receives any compensation for this fix, or for visits to the site, increased traffic to the site could of course indirectly lead to additional business opportunities.]

Hi Bee,
There is indeed "such a bug", though you may be fortunate enough to not be affected. Unfortunately MANY others are affected by this. I spent three days helping track this down (many of those 38 posts were while tracking it down in the Tiger discussions) and find a fix to this and thought that others might benefit by my efforts... By the way it's NOT a Safari bug, it happens in any browser, it's a "lookupd" bug which may be triggered by surfing to certain sites which contain links to "js.adsonar.com", which if you have JavaScript enabled can hang lookupd and take down your entire system... consider yourself lucky that it hasn't happened to you...
Here is some background information if you don't believe me:
Apple Discussions: "Fixes" for lookupd Problems, some via Java Updates
Apple Discussions: System unresponsive within the last week
MacFixit Discussions: Progressive Freeze and Network Access under Tiger
MacFixIt Special Report
MacFixit Follow-up: Another fix for system-wide freezes when Web browsing
I only posted this fix to the specific threads where people were having Safari hang, incase it might help them. Forgive me for trying to help them... I thought that was the point of these boards and that was why they started threads about their issues... I'd be willing to bet that this fix will indeed fix many of their problems...
I also posted one additional new topic here on the Safari board and one on the Tiger board for new readers looking for solutions to the same system hangs they may be getting while surfing.
If this fix does indeed help any of you other readers, please post back here so that Bee can indeed see that I'm not just posting here to waste my time...
-MikeS

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