A Painful Safari - Crashes, stalls?

Ever had one of those days, where everything just seems to be going wrong? Over the last 6 hours, I’ve been trying to debug why Safari, Mail.app, iTunes and Adium crash without ANY explanation, after any of said applications tried to load a webpage.

It started randomly (haven’t made major changes in the last few days), so I assumed it was something corrupted. The only hint was that after Safari, Mail, iTunes or Adium crashed, PubSubAgent would use 100% CPU time. So, I fire up Instruments and look at the trace for PubSubAgent. It seems to be calling CFHTTPCookieStorageFlushCookieStores many times, which is odd, because a quick Google doesn’t return anything useful about this system call, obviously related to CFHTTP.

Fast forward 4 hours later when I’ve cleared caches, nuked my Safari config, tried removing PubSubAgent (which just made it worse). The fix? Removing ~/Library/Cookies/Cookies.plist.

Oddly enough, it has a companion – ~/Library/Cookies/Cookies.plist – corrupt.

So, just a recap; somewhere the system knew my Cookies file was corrupted. But instead of spitting this out to the Console, throwing a Dialog, or ANY form of useful information, I had to trudge through my Library looking for something which could be causing the problem, and manually removing it. It was by chance that I noticed the Cookies folder, which is strangely not in the Safari folder where one would normally expect it.

And just to make matters worse; Safari’s “Reset Safari” did nothing to solve the problem. That’s right, checking the “Remove all cookies” checkbox did NOT remove the cookies!

Creating Linux (Centos) Live CD image on a USB Flash Driv

Then follow these steps:

• Type : diskutil list in the Terminal and hit Enter
• Plug in your USB flash disk and repeat step 1
• Compare the result and you’ll have the device node assigned to your flash media. Usually something like "/dev/disk2" (sans quote)
• Type : diskutil unmountDisk /dev/diskN in the Terminal and hit Enter. You’ll have to replace the /dev/diskN with the device node that you got from step 3. From the picture above you can see that the device node assigned for my USB flash drive is "/dev/disk1" (sans quote)
• Type : sudo dd if=/path/to/downloaded.img of=/dev/diskN bs=1m in the Terminal and hit Enter. But there are several things that you have to change here before you hit Enter:
  - first the /path/to/downloaded.img is the location of the downloaded UNR installer file. As we’ve already taken care of this before, all you’ve got to do is to change the string into/unr.img
  - second, the /dev/diskN is the device node which is the same as step 4
  - and the last, if you see the error line: dd: Invalid number ’1m’ then you need to change thebs=1m into bs=1M (notice the capital ‘M’)
• Write your password, hit enter, and wait until the process is finished. Please be warned that all the data in the USB drive will be lost.
• Type : diskutil eject /dev/diskN in the Terminal and hit Enter.
• Unplug your USB drive.