"iPhoto: Issues with FAT32-formatted drives

Symptoms:
If you store your iPhoto library on a volume that is formatted as FAT32 (a file system commonly used on Windows PCs), you may encounter issues including poor performance or data loss. Referenced images stored on FAT32 volumes may also sporadically go offline.

Additionally, storing the iPhoto library on a network rather than locally on your computer can also lead to poor performance or data loss.

Resolution:
iPhoto libraries should be stored on a locally mounted Mac OS X Extended drive for best performance.

Many external drives come pre-formatted as FAT32. Use Disk Utility to format new external hard drives as Mac OS X Extended before using them with iPhoto. For instructions on how to do so, follow steps in Format external drives to Mac OS Extended before using with Aperture."

I don't recall seeing this before but maybe I missed it. Apple must have had enough support cases to post it, but I never considered using FAT32 drives for that purpose. (4GB file size limit too.)
  

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Friday August 23rd, 2013 News Archive
• 1/3 Scale 1984 Macintosh
• Apple patents new unibody hinge to make laptops even thinner
• iWork for iCloud Beta Open to Public (the Beta's FAQ updated Thursday)
• Apple's TV vision wants ESPN, HBO, Viacom and others along
• The Jobs email exchange that perfectly captures Apple's strategy
• Apple Support/How-To/Troubleshooting Article Updates:
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• Other New/Reviews/Tips/Tech/OT:
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  - Bulletin: Threats to Mobile Devices Using Android Operating System
  - Google Acquires Display Patents from Apple Inc Partner Hon Hai
  - Amazon Is Said to Have Tested a Wireless Network
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  - Review: Samsung 32GB/64GB SDXC Pro card

For links to older news pages, see the Archives.